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2008年高三教学测试(三)

 

英    语

考生须知:

1.全卷分试卷I、II和答题卷三部分,试题卷14页,答题卷2页,86 小题,满分为150分,考试时间为120分钟。

2.本卷全部答案必须做在答题卷的相应位置上,做在试题卷上无效。

3.  请用蓝、黑墨水钢笔或圆珠笔将姓名、准考证号分别填写在答题卷的相应位置上。

 

第Ⅰ卷 (共 100分)

 

第一部分:英语知识运用(共两节,满分50分)

第一节: 单项填空(共20小题;每小题1分,满分20分)

从A、B、C、D四个选项上,选出可以填入空白处的最佳选项,并在答题纸上将该选项标号涂黑。

1. ―Excuse me, could you tell me the time, please?

―Sorry, I don’t have a watch with me.   

― ________.

A. Thanks a lot             B. What a pity  

C. I’m sorry to hear that     D. Thanks anyway

2. ―Does Bill do his new job well?

― ________ his old job. I’m afraid there’s no hope for him.

A. Not better than   B. No better than   C. Not so well as    D. Not as well as

3. ________ the spokesman said at the conference was recorded and translated into other     languages.

A. Whatever      B. No matter what    C. However         D. No matter how

4. Before Tom left home, his mother kept telling him to ________ his manners at the party.

A. mind          B. notice           C. watch         D. care

5. ―What do you think of the manager of your company?

―Oh, he is ________ manager who’s pleasant to work with. It’s ________ pleasure to work with him.

A. the; a         B. a; a              C. a; the        D. 不填; a

6. “It's a waste of money to have the lights __________ all day long,” Mr. Wilson said to the students.

A. burn                B. to burn                C. burning           D. burnt

7. On my way to Hangzhou, something ________ wrong with the car, and it ________ not start.

A. being; could     B. going; should    C. was; might    D. went; would

8. As soon as I entered Evan’s company I saw a board on which ________ “Welcome to Evans”.

A. read          B. wrote           C. was read       D. were written

9. ―How long do you think it is ________ he arrived here?

 ―No more than half a year, I believe.

A. when           B. since          C. before        D. that

10. She will have to find some other work for she can’t ________ this loud noise any more.

A. come up with   B. put up with      C. grow up with D. keep up with

11. ― Why weren't you at the meeting?

― I ________ for a long distance call from my sister in America.

A. am waiting     B. was waiting      C. have waited   D. had waited

12 I’ve just seen no more than one copy of “ Gone with the Wind”in the bookshop opposite. Tom, go and buy______ if you want to have one.

A. one           B. any           C. it             D. some

13. ― Tom, you failed the exam. You see, it was not difficult for you.

― Yes, I ________ it, but I was too careless.

A. must have passed          B. could have passed         

C. might pass                D. would pass

14. The village ________ we see today is no longer ________ it was ten years ago.

A. that; that     B. which; how     C. /; what         D. what; which

15. ― Why not take my car to the museum instead of walking? 

― No, thanks. ________.

A. I’m used to       B. I’m able to    C. I’m about to   D. I’ve got to

16. The thief ran away _____ the police appeared.

A. the moment    B. for the moment  C. even if        D. as though

17. By building a dam instead of new coal plants to meet its growing demand for electricity, China will _____ much less poisonous gases into the air.

A. give away      B. give off        C. give back       D. give in

18. “The rest of the magazines _____ within half an hour,” said the manager very happily.

A. is sold out    B. are sold out     C. was sold out   D. were sold out

19. Ann was reading a detective novel, ________ completely to the outside world.

A. being lost       B. having lost     C. losing          D. lost

20. All the doctors in the hospital insisted that he________ badly wounded and that he________ at once.

A.should be; be operated on    B. were; must be operated on 

C. was; be operated on         D. be; should be operated

第二节: 完型填空(共20小题;每小题1.5分,满分30分)

阅读下面短文,掌握其大意,然后从21-40各题所给的四个选项(A、B、C和D)中,选出最佳选项,并在答题纸上将该选项标号涂黑。

I consider myself something of an expert on apologies. A quick temper(脾气) has   21   me with plenty of opportunities to make them. In one of my earliest   22  , my mother is telling me, “Don’t watch the   23   when you say ‘I’m sorry’. Hold your head up and look the person in the   24  , so he’ll know you   25   it, and he’ll be glad to accept your apology.”

   My mother thus made the key point of a(n)   26   apology: it must be direct. You must never 27   to be doing something else. You do not   28   a pile of letters while apologizing to a person   29   in position after blaming him or her for a mistake that turned out to be your  30  . You do not apologize to a hostess, whose guest of honor you treat   31 _, by sending flowers the next day without mentioning your bad   32  .

   One of the important things you should do for an effective  33   is that we should be ready to   34   the responsibility(责任) for our careless mistakes. We are used to making excuses, which leaves no   35   for the other person to   36   us. Since most people are open-hearted, the no-excuse apology leaves both sides feeling   37   about themselves. After all, that is the   38   of every apology. It   39   little whether the apologizer is wholly or only partly at fault: answering for one’s   40   encourages others to take their share of the blame.

21 .Aprovided           Bmixed          Ccompared      Dtreated   

22.  Adreams           Bcourses       Cmemories                               Dideas

23.  Aside               Bground         Cwall           Dbottom

24.  Amind              Bsoul          Cface            Deye

25.  Aimagine           Benjoy                                                                  C.  mean          Dforget

26.  Auseful             Bsuccessful       C.  equal          Dbasic

27.  Apretend           Bforget          Crefuse             Dexpect

28.  Ahold on            Bput away     C.  look through   Dpick up

29.  Apoorer            Bweaker         Cworse            Dlower

30. Afault               Breason          Cresult            Dduty

31. Acruelly              Bfreely          Crudely          Dfoolishly

32. Amanners            Bexcuses          Cefforts             Droles

33. Achance             Bapology         C.  excuse         Dblame

34. Araise               Bperform      Cadmit            Dbear                    

35. Asituation           Bneed         Csign              Droom

36. Aadvise              Bforgive          Cwarn             Dblame

37. Awiser               Bbrighter          Cbetter            Dcleverer

38. Apurpose            Bmethod                                        C. means                 Dadvantage

39. Acares               Bmatters        Cdepends        Dremains

40. Afacts               Bstates                                          Crights                Dactions

 

第二部分:阅读理解(第一节20小题,第二节5小题;每小题2分,满分50分)

第一节: 阅读下列短文,从每题所给的四个选项(A、B、C和D)中,选出最佳选项。并在答题纸上将该选项标号涂黑。

A

As our van(有篷货车)pulled up to the farm to start a three-month program for troubled boys, we passed a cowboy on his horse. Bill was the owner of the farm, and he sat at the gate to wave us in. We made eye contact(接触) through the dusty window and he gave us a warm welcome.

  All summer long Bill and his farm-hands taught us to ride horses, cut grass, cut up wood, and round up cattle. He understood the value of working with your hands, and we respected him for his knowledge and gentle leadership. He knew how important it was for boys like me to know that someone believed in them. He trusted us to do the job and do it right and we didn’t want to let him down. Several times that summer he took me fishing and we not only talked about how to cast a line, but also about my dreams and what I wanted from life. He encouraged me to make goals and shared stories from his own expenses.

  The last day at the farm, Bill pulled me aside and praised me for the work I had done that summer―not only on the farm, but also on myself. He told me if I ever needed anything I could count on him. Four years later, I took him up on that offer. I called him up and asked for a job, I told him how his confidence in me had given me the courage to change my life. I explained that I wanted to help others in the same way. He offered me a job on the spot. I’m proud to say that each summer I’m the one who opens the gate for a van full of young men who need someone to believe in them, so they can learn to believe in themselves.

41. According to the author, what is important for the troubled boys?

A.     To have a job.

B.      To have enough money.

C.     To know that someone believes in him.

D.     To know that someone takes care of them.

42. Why did the author go to the farm the first time?

A.     He went there to find a part-time job.

B.      He went there to visit the owner of the farm.

C.     He went there to receive education as a troubled boy.

D.     He led some troubled boys there to complete the 3-month program.

43. What does the underlined sentence mean?

A.     He refused bill’s offer.

B.      He accepted Bill’s offer.

C.     He was interested in Bill’s offer.

D.     He felt satisfied with Bill’s offer.

44. From the last paragraph, we can infer that the author ________.

A.     was given a job later

B.      became the owner of the farm

D.     became the gatekeeper of the farm

B

The girls in this sixth grade class in East Palo Alto, California, all have the same access to computers as boys. But researchers say, by the time they get to high school, they are victims (受害者) of what the researchers call a major new gender (性别) gap in technology. Janice Weinman of the American Association of University Women(AAUW) says, "Girls are less comfortable than boys with the computer. They use it more for word processing rather than for problem solving, rather than to discover new ways in which to understand information.
  After re-examining a thousand studies, the AAUW researchers found that girls make up only a small percentage of students in computer science classes. And they use computers less often than boys outside the classroom.
  An instructor of a computer lab says he's already noticed some difference. Charles Cheadle of Cesar Chavez School says, "Boys are not so afraid they might do something that will harm the computer, while girls are afraid they might break it somehow."
  Six years ago, the software company Purple Moon noticed that girls' computer usage was falling behind boys. Karen Gould with the company says, "The number one reason girls told us they don't like computer games is not that they're too violent, or too competitive. Girls just said they're unbelievably boring." What girls want, Purple Moon found, is characters they can relate to and story lines relative to what's going on in their own lives. "What we found from girls is the reason why they wouldn't want to play on a computer; it was just a content thing," says Karen Gould.
  The sponsor(
主办者) of the study says it all boils down to this: the technology gender gap that separates the girls from the boys must be closed if women are to compete effectively with men in the 21st century.
45. According to the passage, girls are victims of the gender gap in technology because ___,
  A. they can not discover new ways to use computers
  B. they have the same access to computers as boys
  C. they are likely to be less comfortable with computers
  D. they can only use computers for word processing
46. Girls often feel _____.
  A. bored with computer games
  B. confident using computers
  C. it easy to use computers in problem solving
  D. interested in the content of computer games
47. The research on girls and computers is ___.
  A. based on a few recent studies
  B. based on a great number of studies
  C. presented by one person
  D. not considered well grounded
48. The gender gap needs to be closed because ___.
  A. it isn't fair that boys are allowed to use computers all the time
  B. there isn't enough money for updating computer system
  C. most of the causes may result in a question of money
  D. the ability to use computers is important in today's world

A "blogger" is a person who writes on an Internet computer website called a "blog". The word "blog" is a short way of saying Web log, or personal website. Anyone can start a blog, and they can write about anything they like.
   There are millions of blogs on the Internet today. They
offer news, information and ideas to many people who read them. They contain links to other websites. And they provide a place for people to write their ideas and react to the ideas of others.
   A research company called Perseus has studied more than 3,000 Web logs. It says that blogs are most popular with teenage girls. They use them to let their friends know what is happening in their lives. The study also says that more than 100,000 bloggers stopped taking part in the activity after a year.
   However, some people develop serious blogs to present political and other ideas. For example, the Republican and Democratic parties in the southern state of Kentucky, US, recently started their own blogs. And American companies are beginning to use blogs to advertise their products.
   At the same time, some long-standing blogs have ended. Last week, blogging leader Dave Winer closed his free blog service, weblogs.com. He says the site became too costly to continue. He started the blog four years ago, and thousands of people had written on it. They are now upset because they did not know that the site was closing.
   One blog that is still going strong is called Rebecca's Pocket. Rebecca Blood created the website in 1999. She wrote about the history of blogs on the site. That article led to a book called "The Weblog Handbook". It has been translated into four languages so far.
   Ms Blood says Rebecca's Pocket gets about 30,000 visitors a month. She writes about anything and everything
politics, culture and movies. She recently provided medical advice. And she wrote about how to prevent people from stealing money from on-line bank accounts.
49. The text is mainly written to _____.
  A. tell us about blogs
  B. tell us how to write blogs
  C. explain why "blogs" are popular

D. introduce some famous bloggers
50. From the text we can learn that blogs cover almost everything except ______.
  A. different ideas                       B. medical advice
  C. advertisements                      D. live parties
51. Which statement is NOT true according to the text?
 
A. Politicians don't use blogs at all.

B. A lot of bloggers give up writing after a while.

C. Those who like to use blogs are mostly teenage girls.

D. Dave Winer closed his website due to money problems.

52. The best reason why Rebecca's Pocket is still going strong is that ______ .
A. it provides information
B. it is about the history of blogs
C. it is about anything and everything
D. it h as editions in at least four different languages

Cafe Hub
Next to the Castle lies The Hub, home of the Edinburgh International Festival and one of the most talked about spots in town. Our cafe is open every day for mouth-watering lunches, snacks and fine dining. Come in and enjoy the atmosphere of The Hub or watch the world go by from our beautiful terrace(
露台).
The Hub, Castlehill, Royal Mile, Edinburgh. Open every day from 9:30 a. m. till late.
Tel: 0131 473 2067 www.thehub-edinburgh.com
Farm World
Enjoy being "A Farmer for a Day". Join in delivering and feeding our spring babies ― bottle feeding sessions twice daily. Fun for all family. Horse Rides, BMX Bikes Cross Country Course, Tractor Ride through 600 acres, New Adventure Playground, Nature Trails. Full details on website.
Open: May ― Oct. Wednesdays to Saturdays and daily during school holidays 11 a. m. ― 5 p. m.
Tel: 01797 260256/260321 www.farmworld-rye.co.uk
Enter the Europe-wide student competition!
Are you curious, creative and energetic? Are you interested in the new media? Are you between 12 and 19 years of age? Then Joining Multimedia 2008 is for you!
Your challenge will be to build a team and develop a multimedia presentation in English ― based on one of three different topics. You can register (
报名) between May 1 and June 15, 2008 and will have to turn in your entry before September 15, 2008
The rewards are wonderful:
150,000 in prize for schools and teams and the chance to attend a European student camp ― an opportunity to make friends throughout Europe! For further information and registration forms go to: www.siemens.com/join-multimedia.
53. You'll have to register first if you want ____ .
  A. to enjoy delicious food
  B. to try Tractor Ride through 600 acres
  C. to enter the Europe-wide student competition
  D. to watch the world go by from the beautiful terrace
54. According to the passage, there will be ____ rewards for the Europe-wide student competition.
  A. one          B. two          C. three            D. four
55. You can visit Farm World ____.
  A. on Monday in May              
B. on Thursday in October
  C. at 2 p. m. at Christmas          
D. at 9:30 a.m. during school holidays
56. From the advertisements above, we can learn that ____.
  A. Cafe Hub is a popular place in the local area
  B. Farm World provides lunches, snacks and fine dining

C. families can enjoy Horse Rides on New Adventure Playground
D. the Europe-wide student competition will be held on June 15, 2008

For years, prices have risen in China for many reasons. However, inflation (通货膨胀) has not badly affected people's lives because living standards have improved. Inflation is not an unbeatable beast. In fact, economists from all over the world have found ways to stop or reduce it. There are now several methods of controlling inflation.
Reduce the amount of money being issued
 
Many experts believe inflation happens because too much money is printed. The more money the central bank issues, the more inflation there is. Therefore, the most important thing to do for any government is to control the amount of money being issued.
Cut down on government spending and increase government income
 
Over
-spending and over-expanding of governments can make inflation worse. Therefore it is helpful to reduce the size of big government bodies, cut down on their spending and pay fewer and smaller subsidies (津贴) to prevent inflation from speeding up.
Slow down the increase of salaries
 
It seems that giving bigger salaries to workers helps them manage when prices of their shopping are going up. In fact, as salaries increase, the central bank will have to issue more money to pay for the increase. Thus, increasing salaries may not be so good as it sounds. It's like cheating. Salaries should only be increased if workers produce more.
Increase bank interests
 
Interest increases can make more people put more money into banks. At the same time, enterprises take out fewer loans. Demand for money on the whole is lower.
Keep prices under strict control
 
Prices can be lowered by setting a ceiling
--the highest prices--for most goods and freezing prices on most goods.
57. The word "issue" in Paragraph 2 means ____.
  A. use            B. print          C. quarrel        D. invent
58. The writer uses "medicine" in title to stand for ____.
  A. ways to reduce inflation            B. reasons for inflation
  C. something to treat patients          D. prices without control
59. What is probably the best way to reduce inflation?
  A. No money will be issued.           B. Salaries will be reduced.
  C. More products will be produced.    D. Prices will be controlled.
60. Which of the following is NOT mentioned as a way of reducing inflation?
  A. controlling prices

B. adjusting bank interests
C. improving people's living standards
D. controlling the amount of money being issued

第二节:Ms. Robinson,Hilary,Rose, Mr. Pearson和John都是老师,他/她们的学生想参加一些学习或活动,第61至65题是他/她们的情况介绍。阅读下列材料,从所给的六个选项(A、B、C、D、E和F)中,选出符合各小题要求的最佳选项,并在答题卷上将该项涂黑,选项中有一项是多余选项。

61. _________ Ms. Robinson’s students are studying French and German. She would like them to speak both of the languages at some point while they are away.

62. _________ Hilary’s students are fourteen years old. Some of them learn French, so she wants to find a holiday course which can offer individual language lessons for those who would like to improve their French.

63. _________ Rose has a small group of students. They all want to sail but unfortunately some of them are unable to swim, although they’re eager to learn.

64. _________ Mr. Pearson’s class have just started to learn German and he wants a holiday which mixes studying the language with plenty of free time to explore the foreign country.

65. _________ John has a class of eleven-year-olds who are crazy about sport. He’d like a course which organizes a complete program, including all kinds of sports, meals and entertainments.

A.     Summer School in the Czech Republic: Spend a week in a sports center 15 minutes south of Prague. Each day’s program is organized by our professional trainers for children aged 10―14. Prices include breakfasts, lunches and dinners as well as sightseeing trips.

B.      Summer in France: We’ll arrange a program to suit your students. All our courses take place at the university in Marseille. Morning classes are held in German, evening lectures on France history are in French. We offer an exciting program of evening activities including music, dance and theatre.

C.     Greek Sailing Holidays: Arrive by air and then hire one of our new boats with all the latest equipment to sail around the Greek islands. These boats sleep up to twenty students and two teachers. Trained sailing staff are available but you must be able to swim.

D.     Summer Course in Finland: If you love water sports you’ll love our one-week sports holiday on the Finnish lakes. There are opportunities to swim, sail and water-ski. Lessons are available if you need them. There is also a chance to learn Finnish at no extra cost! Everyone is welcome.

E.      Holiday Programs in Germany: We offer morning classes in the German language at all levels from beginners upwards. In the afternoon you’re free to join our mountain walks or to go shopping in the nearby town. In the evening we organize a full program of entertainments. All ages are welcome!

F. Summer Schools in France: Opportunities to speak French! We offer summer schools for students between the ages of 12 and 16. live with a French family and choose from a range of different activities including horse-riding, indoor hockey, football, swimming and dry skiing. Private language; lessons arranged if requested.

  

第II卷 (共50分

第三部分:写作(共三节,满分50分)

第一节: 单词拼写(共10小题;每小题1分,满分10分)

  根据下列句子及所给单词的首字母,在答题纸上按题号写出各单词正确的完全形式(每空限写一词)

66. Years ago, my daughter p_________ apples to bananas. But now she likes neither of them.

67. It was too noisy outside. I couldn’t fall a__________ last night. What about you?

68. Passengers, Flight 6607 is taking off. Please go on b_________ the plane immediately.

69. I think reading English newspapers is a good way of i__________ your English.

70. The illness spread q__________ and soon masses of people in the surrounding areas were in hospital.  

71. According to the school rule, we students are f__________ to use cellphones in the school.

72. Excuse me, could you lend me one of your d__________? I want to look up a new expression in it.

73. Every four years athletes from all over the world c__________ for medals and develop

   friendship as well at the Olympic Games.

74. The e___________ to the cave has been blocked up, so you can’t go in.

75. Children are taught to show r__________ for their teachers and parents.

第二节: 短文改错(共10小题;每小题1分,满分10分)

    此题要求改正所给短文中的错误。对标有题号的每一行作出判断:如无错误,在该行右边横线上画一个勾(√);如有错误(每行只有一个错误),则按下列情况改正:

    该行多一个词:把多余的词用斜线(\)划掉,在该行右边横线上写出该词,并也用斜线划掉。

    该行缺一个词:在缺词处加一个漏字符号(∧),在该行右边横线上写出该加的词。

    该行错一个词:在错的词下划一横线,在该行右边横线上写出改正后的词。

原行没有错的不要改。

In modern times, many people say “Never give up or you will                 76.___________

succeed”. However, in my opinion, sometime giving up is also a               77.___________

kind of beauty. We may have to give up some things

―even some of our favorite ones, if we want to succeed in.                     78.___________            

At one time, I was very interested in basketball that I was crazy           79.___________

about playing it on the playground as soon as school was over, that                80.___________

cost me a lot of study time. As a result, my grades went straight              81.___________        down. My teacher notice that and had several heart-to- heart talks                                               82.___________

with me, so I said “goodbye” to them. From then on, I devoted             83.___________

myself to studying, and once again became one of the top student                 84.___________

in my class. I was very happy and so my teacher. Sometimes to give        85.___________

up is to gain more. Please believe that giving up can also be a kind of beauty.  

         

第三节: 书面表达(满分30分)

假如你叫Jack,参加学校开展的“有困难向谁求助”(Whom do you turn to when in trouble?)的调查活动,调查结果如下表。请用英语给校报编辑写一封信反映相关内容。

求助对象

比例

理  由

同学、朋友

58

年龄相仿,容易理解与交流

老师、家长

30

有爱心、有经验,可以信任

12

不愿与人交流,难以与人沟通

注意:1.内容要点全面,并表达出你的观点。为了使文章连贯,可适当增加内容。

2.词数:100词左右。

3.文章的开头和署名已给出。

Dear editor,

I'm a student in Senior Three. We have made a survey"Who do you turn to when in trouble?" Here are the results.

_______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Yours

Jack

试题详情

重庆育才中学 2009级高二下期半期考试

  语文试题

 

第一卷(选择题,共十题30分)

试题详情

机密★启用前                         【考试时间:59  9:0011:30

昆明市2008届高三适应性考试

理科综合能力测试

    本试卷分第Ⅰ卷(选择题)第Ⅱ卷(非选择题)两部分。第Ⅰ卷1至6页,第Ⅱ卷7至12页。考试结束后将本试卷和答题卡一并交回。满分300分,考试用时150分钟。

第Ⅰ卷(选择题,共126分)

注意事项:

1.    答题前,考生务必用黑色碳素笔将自己的姓名、考号在答题卡上填写清楚。

2.    各题选出答案后,用2B铅笔把答题卡上对应题目的答案标号涂黑。如需改动,用橡皮擦擦干净后,再选涂其它答案标号。答在试卷上的答案无效。

可能用到的相对原子质量:H 1   C 12   O 16   S 32   Fe 56   Cu 64

本卷共21小题,每小题6分,共126分。

试题详情

机密★启用前   【考试时间:5月8日   15:0017:00

昆明市2008届高三适应性考试

理科数学试卷

本试卷分第Ⅰ卷(选择题)和第Ⅱ卷(非选择题)两部分,共5页. 第Ⅰ卷1至2页,第Ⅱ卷3至5页. 考试结束后,将本试卷和答题卡一并交回. 满分150分,考试用时120分钟.

参考公式:

如果事件AB互斥,那么                           球的表面积公式

                       

如果事件AB相互独立,那么                     其中R表示球的半径

                        球的体积公式

如果事件A在一次试验中发生的概率是P,那么                 

n次独立重复试验中恰好发生k次的概率              其中R表示球的半径

第Ⅰ卷(选择题 ,共60分)

注意事项:第Ⅰ卷共2页,共12小题 ,请用黑色碳素笔将答案答在答题卡上,答在试卷上的答案无效.

 

试题详情

机密★启用前   【考试时间:5月8日   15:0017:00

昆明市2008届高三适应性考试

文科数学试卷

本试卷分第Ⅰ卷(选择题)和第Ⅱ卷(非选择题)两部分,共5页. 第Ⅰ卷1至2页,第Ⅱ卷3至5页. 考试结束后,将本试卷和答题卡一并交回. 满分150分,考试用时120分钟.

参考公式:

如果事件AB互斥,那么                           球的表面积公式

                       

如果事件AB相互独立,那么                     其中R表示球的半径

                         球的体积公式

如果事件A在一次试验中发生的概率是P,那么                 

n次独立重复试验中恰好发生k次的概率              其中R表示球的半径

第Ⅰ卷(选择题 ,共60分)

注意事项:第Ⅰ卷共2页,共12小题 ,请用黑色碳素笔将答案答在答题卡上,答在试卷上的答案无效.

试题详情

KM200803

机密 ★ 启用前               【考试时间:5月9日  15:00~17:00】

昆明市2008届高三适应性考试

英  语 

本试卷分第一卷(选择题)和第二卷(非选择题)两部分。第一卷1至10页,第二卷第11页。考试结束后,将本试卷和答题卡一并交回。满分150分,考试用时120分钟。

 

第Ⅰ卷(选择题,共115分)

注意事项:

1.  答题前,考生务必用黑色碳素笔将自己的姓名、准考证号、考场号、座位号在答题卡上填写清楚,并认真核准条形码上的准考证号、考场号、座位号及科目,在规定的位置贴好条形码。

2.  每小题选出答案后,用2B铅笔把答题卡上对应题目的答案标号涂黑。如需改动,用橡皮擦擦干净后,再选涂其它答案标号。答在试卷上的答案无效。

 

第一部分  听力(共两节,满分30分)

       做题时,先将答案标在试卷上。录音内容结束后,你将有两分钟的时间将试卷上的答案转涂到答题卡上。

 

第一节(共5小题;每小题1.5分,满分7.5分)

听下面5段对话。每段对话后有一个小题,从题中所给的A、B、C三个选项中选出最佳选项,并标在试卷的相应位置。听完每段对话后,你都有10秒钟的时间来回答有关小题和阅读下一小题。每段对话仅读一遍。

例:How much is the shirt?

A. £19.5.                                 B. £9.15.                            C. £9.18.

答案是B。

1. What time is it now?

A. 8:40.                   B. 8:20.                      C. 9:40.

2. What does the man mean?

A. He is wealthy.               B. He is smart.                C. He is healthy.

3. Where does Jim’s mother work?   

A. In an agency.               B. In a factory.               C. In a hospital.

4. What is Betty’s opinion?

  A. Men are better teachers than women.

  B. Men are better cooks than women.

  C. Men are better workers than women.

5. What are they talking about?

  A. A new book.            B. A new film.           C. A person.

 

第二节(共15小题;每小题1.5分,满分22.5分)

听下面5段对话或独白。每段对话或独白后有几个小题,从题中所给的A、B、C三个选项中选出最佳选项,并标在试卷的相应位置。听每段对话或独白前,你将有时间阅读各个小题,每小题5秒钟;听完后,各小题将给出5秒钟的作答时间。每段对话或独白读两遍。

听第6段材料,回答第6-7题。

6. What is the woman?     

A. The man’s wife.

B. The man’s daughter.

C. A worker in the hotel.

7. Does the man smoke?  

A. Yes, he does.            B. No, he doesn’t.         C. It isn’t mentioned.

听第7段材料,回答第8-10题。

8. Where did the man work before?

A. In a bank.                   B. At a school.              C.In a government office.

9. How does the man like the work and people in the sales department?   

A. The work is tiring, and people unfriendly.

B. The work is tiring, but people friendly.

C. The work isn’t tiring, but people unfriendly.

10. What does the woman wish?

  A. The man would work hard.

  B. The man would get on well with the people.

  C. The man’s dream would come true.

听第8段材料,回答第11-13题。

11. What’s the relationship between the speakers?

  A. A woman and her son.

  B. A woman and her husband.

  C. A customer and a shop assistant.

12. Which handbag will the woman take?

  A. The red one.               B. The cheaper one.        C. A more expensive one.

13. What is the woman’s address?

  A. 1414 Main Street.

  B. 1440 Main Street.

  C. 4014 Main Street.

听第9段材料,回答第14-16题。

14. Why does the man often go to Tokyo?

  A. To see his friends.          B. To meet his son.        C. To do business.

15. When is the maglev train leaving today?

  A. At 2:55 pm.             B. At 10:50 am.           C. At 2:55 am.

16. How will the woman go to Tokyo?

  A. By air.                      B. By train.              C. By bus.

听第10段材料,回答第17-20题。

17. What’s the weather like in most areas of Tibet?

  A. Very wet.                         B. Very dry.                        C. Very hot. 

18. What does “epidemic” probably mean in the passage?

  A. A kind of food.                     B. A kind of animal.              C. A kind of disease.

19. How high is the peak of Himalaya Mountains?

  A. Over 25,000 feet.           B. Over 35,000 feet.      C. Below 25,000 feet.

20. What do the sportsmen want to see?

   A. The window of the world.    B. The door of the world.      C. The roof of the world.

 

第二部分  英语知识运用(共两节,满分45分)

第一节   语法和词汇知识(共15小题;每小题1分,满分15分)

    从A、B、C、D四个选项中,选出可以填入空白处的最佳选项,并在答题卡上将该项涂黑。

21. The computer looks old, but it _________ just half a year ago.

A. has been bought      B. will be bought   C. is bought                 D. was bought

22. There will be a beautiful central park in _________ used to be a chemical plant.

    A. where                    B. there               C. what                      D. that

23. ―How do you like this hotel?

―Excellent. I couldn’t have found a _________ one.

A. good                     B. bad                C. best                      D. better

24. ―School kids will surely benefit a lot from this creative program.

―Exactly, we are looking forward to seeing it _________ soon.

    A. carrying out           B. carried out      C. to carry out            D. to be carried out

25. The bus has gone. You _________ have been here earlier.

A. should                   B. must             C. need                     D. can

26. ―Could you tell me the way to Edward Clinic?

    ―Sorry, but I’m afraid there is not _________ Edward Clinic nearby.

    A . /                           B. the                        C. a                           D. an

27. ―I heard some students trying _________ best to practise an English song again and again.

    ―You know, they are preparing for the school art festival.

    A. they                      B. them               C. his                         D. their

28. It was _________ the weather was terribly bad that we had to put off the sports meet.

    A. because                  B. since               C. for                               D. as

29. ―Can I help you, Madame?

    ―Oh, thanks, but I can _________ it myself.

    A. help                      B. support           C. see                               D. manage 

30. ―We have failed, all in vain.

    ―Don’t be so upset. _________ try it again.

    A. Let’s                      B. Let us             C. Have                     D. Have to

31. English, as a foreign language, _________, will be of little use, no matter how hard you work at it.

    A. when not learned properly               B. when not learning properly  

C. not when learned properly               D. not when leaning properly

32. ―I found my mom not feeling well this morning. I’m afraid she is ill.

―_________.

A. Don’t worry too much                            B. It’s nothing at all

C. I’m sorry to hear that                       D. Take it easy

33. Our Chinese teacher and head teacher, whose experiences _________ like a poem, can always inspire us to spare no effort in our study.

A. sounds                   B. sound             C. is sounded              D. are sounded

34. Alice changed her mind at the last moment, _________ really made her friends not know what to do.

A. which                    B. what               C. that                       D. it

35. It is widely concerned that this kind of species are _________ rapidly.

A. dying out               B. dying down     C. dying away            D. dying back

   

第二节        完形填空(共20小题;每小题1.5分,满分30分)

阅读下面短文, 从短文后所给的各题四个选项 (A、B、C和D) 中, 选出可以填入空白处的最佳选项, 并在答题卡上将该项涂黑。

The story goes that some time ago, a man punished his 3-year-old daughter for wasting a roll of gold wrapping paper. Money was    36    and he became upset when the child tried to       37    a box to put under the Christmas tree.    38   , the little girl brought the    39    to her father the next morning and said, "This is the gift for you, Daddy."

The man was    40    by his earlier overreaction (过度反应), but he    41    angry again when he found out the box was    42  . He yelled at her, adding, "Don't you know, when you give someone a present, there is supposed to be    43    inside?" The little girl    44    at him with tears in    45    eyes and cried, "Oh, Daddy, it's not empty at all. I blew    46    into the box. They're all for you, Daddy."

The father was    47   . He put his arms around his little girl, and he    48    for her forgiveness.

Only a short time    49   , an accident took the life of the child. It is also told that ever since then her father kept that    50    box by his bed for many years and,    51    he was discouraged, he would take out a(n)   52    kiss and remember the    53    of the child who had put it there.

In a very real sense, each one of us, as human beings, has been given a gold    54    filled with unconditional love and kisses from our children, family members, friends, and God. There is    55    no possession, anyone could hold, more precious than this.

 

36. A. poor                       B. rich                      C. tight                     D. loose

37. A. decorate                  B. furnish                   C. finish                          D. complete

38. A. Otherwise                B. Nevertheless            C. Finally                   D. Truthfully

39. A. tree                       B. notebook               C. book                     D. box

40. A. delighted               B. angry                    C. ashamed                D. happy

41.A. began                        B. got                            C. appeared                D. found

42.A. full                        B. fill                               C. empty                    D. dull

43. A. anything                  B. something               C. everything              D. nothing

44. A. looked down                  B. looked into             C. looked out              D. looked up

45. A. its                           B. his                      C. her                               D. their

46. A. kisses                      B. luck                       C. joy                               D. delight

47. A. embarrassed             B. shocked                        C. interested               D. disappointed

48. A.wanted                     B. moved                   C. excused                  D. begged

49. A.before                     B. after                      C. later                              D. ago

50. A. iron                       B. silver                     C. copper                   D. gold

51. A. wherever                  B. whenever               C. whichever               D. however

52. A. imaginary                       B. wonderful              C. actual                     D. movable

53.A. honour                     B. likeness                  C. memory                        D. love

54.A. cup                            B. container                C. case                       D. room

55.A. simply                   B. normally                C. mostly                   D. hardly

 

第三部分 阅读理解(共20小题;每小题2分,满分40分)

阅读下列短文,从每题所给的四个选项(A、B、C和D)中,选出最佳选项,并在答题卡上将该项涂黑。

A

A ticket for the Titanic's ill-fated voyage that belonged to the last survivor with memories of the disaster was sold to a collector from the United States at a British auction (拍卖) Saturday.

Lillian Asplund, who died in 2006 at the age of 99, was 5 years old when the Titanic hit an iceberg and sank during its maiden voyage from England to New York in 1912. Her father and three siblings (同胞) were among the 1,500 people who died.

She was the last American survivor of the disaster and the last with memories of it. There are at least two alive survivors who had been too young at the time of the sinking to recall their experience.

Asplund's ticket was sold for $65,772, auctioneer(拍卖商)Andrew Aldridge said.

Another key item sold from Asplund's collection was her father's pocket watch, which reportedly stopped at the exact moment the ship sank.

Aldridge said the hands of the watch were stopped at 2:19 a.m., when Asplund's father Carl fell into the North Atlantic and seconds before the Titanic disappeared beneath the waves.

The watch was bought by a Swedish collector for $61,786, Aldridge said.

He said most of Asplund's collection of 364 items ― which included rare photographs of the Titanic and post cards printed to mark the voyage ― had been sold at Saturday's auction.

The lots(拍卖品)were previously kept at Asplund's home in Massachusetts and had never been seen before in public, he said.

Asplund's parents, Carl and Selma, and their five children were traveling on the Titanic as they headed from their home in Sweden to the U.S. to make a new life in Worcester, Massachusetts, Aldridge said.

Lillian, her youngest sibling, Felix, and their mother, Selma, all survived the sinking.

 

56. We can learn from the passage that ___________.

A. the ticket and the watch were sold for $61,786.          

B. Asplund’s parents wished to make a new life in America.

C. Lillian was the only child in the family.                  

D. Lillian was then too young to remember the experience.

57. Which of the following statements is TRUE according to the passage?

   A. Lillian Asplund was the last survivor who could remember the disaster.            

B. Lillian Asplund was the last survivor of the disaster.

   C. All of Asplund’s collection had been sold.         

D. The Titanic sank beneath the waves before 2:19 am.

58. What happened to Asplund’s collection before the auction?

A. An American collector bought the Titanic ticket.

B. They were exhibited in the museum.

C. They were kept secretly at Asplund’s home.

D. Nobody wanted to buy all the collection.

59. The passage is mainly about ___________.

A. the Titanic belongings of the last US survivor were sold.        

B. Asplund’s ticket was sold for $65,772.

C. Lillian survived the sinking with her mother and her little brother.  

D. Lillian had some rare photographs of the Titanic and some post cards.

 

B

In our life, we have rarely expressed our gratitude to the one who lived those years with us. In fact, we don't have to wait for anniversaries(周年纪念日)to thank the ones closest to us and the ones so easily overlooked. If I have learned anything about giving thanks, it is this: give it now! While your feeling of appreciation is alive and sincere, act on it. Saying thanks is such an easy way to add to the world's happiness.

Saying thanks not only brightens someone else's world, it brightens yours. If you're feeling left out, unloved or unappreciated, try reaching out to others. It may be just the medicine you need. Of course, there are times when you can't express gratitude immediately. In that case, don't let embarrassment sink you into silence and speak up the first time you have the chance.

Once a young minister, Mark Brian, was sent to a remote parish(教区)of Kwakiutl Indians in British Columbia. The Indians, he had been told, did not have a word for thank you. But Brian soon found that these people had unusual generosity. Instead of saying thanks, it is their custom to return every favor with a favor of their own, and every kindness with an equal or superior kindness. They do their thanks. I wonder if we had no words in our vocabulary for thank you, would we do a better job of communicating our gratitude? Would we be more responsive, more sensitive, more caring?

Thankfulness sets in motion a chain reaction that transforms people all around us ?including ourselves. For no one ever misunderstands the melody(旋律)of a grateful heart. Its message is universal; its poems transcend(超越)all earthly barriers; its music touches the heaven.

 

60. Who do we easily forget to express our thanks to according to the writer?

   A. Friends not meeting for a long time.    B. Former teachers and friends.

   C. People we want to get close to.        D. Our family members and good friends.

61. When we say something for what others do for us, it ___________.

   A. benefits to people who do something for us

   B. is good for both us and people who help us

   C. waste our and our friends’ time at the same time

   D. does harm to both us and people who help us

62. What does the writer mean in the third paragraph?

   A. The only way to thank others is to express by your own words.

   B. The best way to thank others is to do something for them.

   C. We can thank people who help us in various ways.

   D. We can thank people who help us in two ways.

63. The way to make us feel happy is ___________ when we think we ourselves are forgotten in the world.

   A. to help and appreciate others           B. to ask others to help us

   C. to remind others of our helping them     D. to ask someone to help others

 

C

Due to our rapid development, Yew Chung International School of Shanghai, an international school officially recognized by and registered with the Chinese government, is looking for caring, compassionate (热情) and qualified teachers to help our students to be global citizens and to appreciate the culture of East and West.

WE ARE CURRENTLY LOOKING FOR

ECE Teacher for age 1-5 / Secondary Math Teacher / Primary Music Teacher

Special Needs Teacher / Head Librarian / IC Teacher

QUALIFICATIONS

1. A native English speaker with excellent oral and writing skill.

2. Possess a Bachelor Degree in Education or equivalent (同等) qualifications.

4. Having a positive attitude and flexibility when dealing with work and people.

5. Head librarian is preferred to be one who can speak Chinese as well.

6. A team player.

For more information, please visit our website at www.ycef.com

Or you can email your CV (简历) to lindap@sh.ycef.com

………………………………………………………………………

Bridgehead Media is in search of a Fashion Editor who will lead an editorial team to create a cutting edge and stylistic publication that will be distributed to over 300,000 readers in China. This position will be based in Shanghai and requires some travel throughout the country.

REQUIREMENTS

Fluent in English

Previous (以前的) experience in journalism of writing with a preference in fashion

Understanding the fashion market and trends of the industry

RECRUIT FASHION EDIOR

Please send resumes (简历) to Jimmy.yang@bridgeheadmedia.com and

include any writing samples as well.

                            

64. You can get more information about qualifications at ___________.

   A. lindap @sh.ycef.com                              B. Jimmy.yang@bridgeheadmedia.com

C. www.ycef.com                      D. www.edu.bridgeheadmedia.com

65. An applicant speaking two languages is helpful if he wants to be ___________.

   A. an ECE Teacher                                     B. a Secondary Math Teacher

C. a Primary Music Teacher                         D. a Head Librarian

66. What Bridgehead Media wants is an editor ___________.

   A. who is in charge of the section            B. who likes fashion

   C. who is sensitive to fashion                 D. who is good at fashion

67. Which of the following is NOT the ability demanded by Bridgehead?

   A. Speaking fluent English.              B. Experience in media.

C. Knowing related market well.          D. Wearing fashion clothes.

                                 D

Failure is part of the human condition. Most parents work hard at either preventing failure or protecting their children from the knowledge that they have failed. One way is to lower levels. A mother describes her child's quickly making table as "Perfect"!  Even though it shakes on unbalanced legs. Another way is to shift (转嫁) blame. If John fails science, his teacher is unfair or stupid. The trouble of doing such things is that children are not well-prepared for life in the real world. The young need to learn that no one can be best at everything, no one can win all the time, and that it's possible to enjoy a game even when you don't win. The young should be allowed to experience disappointment and be helped to master it.

Failure is never pleasurable. It hurts adults and children. But it can make a positive contribution to your life once you learn to use it. Ask yourself what you did wrong, how you can improve. Success, which encourages repetition of old behavior, is not nearly as good a teacher as failure. You can learn from a disastrous(失败的)party how to give a good one, from an ill-chosen first house what to look for in a second. Even a failure that seems definitive can produce fresh thinking, a change of direction. After 12 years of studying ballet (芭蕾舞) a friend of mine was turned down. "Would further training help?" she asked. The ballet master shook his head. "You haven't the body for it."

In such cases, the way to use failure is to learn the lesson quickly, asking “What have I left? What else can I do?" My friend put away her toe shoes and moved into dance treatment, a field where she is both competent (能力强) and useful. Failure frees one to take risks because there's less to lose.

68. The writer shows a(n) ___________ attitude to the behaviors of most parents.

   A. positive                    B. neutral                 C. negative           D. passive

69. In the second paragraph, the writer describes the contribution of failure from ___________ aspect(s ).

   A. one                     B. two                  C. three            D. more than three

70. According to the passage, we can learn something useful based on ___________.

   A. what we love                            B. what we can do

C. what we experienced                         D. what we have achieved

71. The best title of the passage is “___________”.

   A. The More Failure, the Better                B. Learning from Failure

C. Failure Is an Experience of Life             D. Failure Is Our Mother

 

E

Dressage (盛装舞步) rider Liu Lina is the first Chinese rider to have qualified for an equestrian (马术) event at the Games.

   “We got the letter from the International Equestrian Federation (FEI) this week saying Liu’s result (in March) has been approved and she is the first Chinese rider to qualify for the Olympics,” the country’s equestrian chief Cheng Qing said.

    Liu’s qualification has made the host’s dream of providing an athlete for every sport at the Games come true.

    As the host country of the Olympics, China was given six equestrian berths (名额)―four in jumping and one in both dressage and eventing. Riders only needed to meet the minimum qualification standards to participate in the Game.

    The 29-year-old rider from the Xinjiang Uygur Autonomous Region is certainly the best dressage rider in the country, having won several national titles.

    Supported by the local sports bureau (体育局), since 2006 she has been training in Germany, one of the sport’s powerhouses (体育强国). And it is estimated(估计)a rider needs to spend around 2.5million to compete in the Olympics.

    “She has made great progress there thanks to world-class training facilities(设施) and training methods,” Cheng said. “Her results were much better than the Olympic qualification standards.”

    Liu will continue her preparations in Germany before the games to further enhance her skills. Five Chinese riders and their horses have been registered with FEL, the sport’s governing body, in order to make their way to Hong Kong, where the equestrian events are to be held.

 

72. How long will Liu Lina have been trained abroad by the time of the games?

A. Less than one year.         

B. One year.

C. More than two years. 

D. Less than two years.

73. From the passage we know that equestrian events will be held in __________.

   A. Beijing           B. Hongkong       C. Shanghai       D. Xinjiang

74. The underlined word “enhance” in the last paragraph refers to ___________.

   A. improve           B. create            C. construct       D. inspire

75. We can conclude from the text that ___________.

A. Chinese athletes will participate in all the sports

B. Five Chinese riders all have been trained abroad

C. Liu Lina has been trained in China since 2006

D. Liu Lina is the only Chinese dressage rider athlete

 

 

 

 

 

 

机密 ★ 启用前               【考试时间:5月9日  15:00~17:00】

昆明市2008届高三适应性考试

英  语 

第Ⅱ卷(共35分)

注意事项:第二卷共1页,用黑色碳素笔将答案答在答题卡上。答在试卷上的答案无效。

 

第四部分:写作(共两节,满分35分)

第一节:短文改错(共10小题,每小题1分,满分10分)

    此题要求改正所给短文中的错误。对标有题号的每一行作出判断:如无错误,在该行右边横线上画一个勾(√);如有错误(每行只有一个错误),则按下列情况改正:

    该行多一个词:把多余的词用斜线(\)划掉,在该行右边横线上写出该词,并也用斜线划掉。

    该行缺一个词:在缺词处加一个漏字符号(∧),在该行右边横线上写出该加的词。

    该行错一个词:在错的词下划一横线,在该行右边横线上写出改正后的词。

注意:原行没有错的不要改。

After a final examination, I got a letter from my best           76.              

friend and his parents live on a farm. They invited me                77.                

stay with them for several weeks. I was so excited                   78.                

that I could sleep all night. When I got to their home,                      79.                

I was warm received. I lived in a big and nice room.               80.                

I enjoyed the life there very much. Every morning             81.                

we got up early and walk on the farm where we could               82.                

enjoy the fresh air or beautiful scenery. We gathered             83.                

some flowers here and there, and I found it filled                 84.                

of funs. In the afternoon we did our homework. I did               85.                

have a good time.

第二节   书面表达(满分25分)

假定你是李华,你的朋友 Peter今年要来你们家乡旅游,并打算买一件纪念品,他来信询问你买什么好,请按以下内容要点给他写封回信。

1.       名称;

2.       产地、价格;

3.       理由。

注意; 1.词数100字左右;

2.可以适当增加细节,使行文连贯;

3.开头语已为你写好。

Dear Peter,

   I’m very happy to receive your letter in which you asked me to introduce a typical souvenir made in my hometown..

                                                 

Yours,

Li Hua

昆明市2008届高三适应性考试

试题详情

机密★启用前   【考试时间:58   9:0011:30

昆明市2007~2008学年高三适应性考试

本试卷分第I卷(选择题)和第Ⅱ卷(非选择题)两部分,第I卷1至4页,第Ⅱ卷5至8页。考试结束后,将本试卷和答题卡一并交回。本试卷满分150分,考试用时150分钟。

第Ⅰ卷(选择题,共30分)

注意事项:1.答题前,考生务必用黑色碳素笔将自己的姓名、考号、考场号、座位号等在答题卡上填写清楚,并认真核准。

2.每小题选出答案后,用2B铅笔把答题卡上对应题目的答案标号涂黑。如需改动,用橡皮擦干净后,再选涂其他答案的标号。答在试卷上的答案无效。

 

试题详情

高2009级文科半期测试题

 

本试卷分第Ⅰ卷(选择题)和第Ⅱ卷(非选择题)两部分。满分100分。考试时间100分钟。

 第Ι卷(选择题  共50分)

注意事项:

1.答第Ⅰ卷前考生务必将自己的姓名、准考证号、考试科目、试卷类型涂写在答题卡上。考试结束,将试题卷和答题卡一并交回。

2.每小题选出答案后,用铅笔把答题卡上对应题目的答案标号涂黑,如需改动,用橡皮擦干净后,再选涂其它答案标号,不能答在试题卷上。

试题详情

重庆育才中学高一下期期中化学测试题

              (考试时间:120分钟    总分:150)    

出题人:秦俭        审题人:王志敏

答题所需相对原子质量:H-1  C-12  O-16  Na-23  N-14  S-32

Cu-64  Zn-65  I-127 

提示:答案请写在答题卷上

第Ⅰ卷   选择题(共74分)

试题详情

       高中物理课堂教学教案       年   月    日

§ 3.6带电粒子在匀强磁场中的运动    

新授课

2课时

       

(一)知识与技能

1、理解洛伦兹力对粒子不做功。

2、理解带电粒子的初速度方向与磁感应强度的方向垂直时,粒子在匀强磁场中做匀速圆周运动。

3、会推导带电粒子在匀强磁场中做匀速圆周运动的半径、周期公式,知道它们与哪些因素有关。

4、了解回旋加速器的工作原理。

(二)过程与方法

通过带电粒子在匀强磁场中的受力分析,灵活解决有关磁场的问题。

(三)情感、态度与价值观

通过本节知识的学习,充分了解科技的巨大威力,体会科技的创新与应用历程。

教学重点、难点

教学重点

带电粒子在匀强磁场中的受力分析及运动径迹

教学难点

带电粒子在匀强磁场中的受力分析及运动径迹

 

实验观察法、讲述法、分析推理法

 

 

 

   洛伦兹力演示仪、电源、投影仪、投影片、多媒体辅助教学设备

 

                 教学活动

(一)引入新课

(复习提问)

(1)什么是洛伦兹力?  

(2)带电粒子在磁场中是否一定受洛伦兹力?

(3)带电粒子垂直磁场方向进入匀强磁场时会做什么运动呢?

今天我们来学习――带电粒子在匀强磁场中的运动。

(二)进行新课

1、带电粒子在匀强磁场中的运动

介绍洛伦兹力演示仪。如图所示。

引导学生预测电子束的运动情况。

(1)不加磁场时,电子束的径迹;

(2)加垂直纸面向外的磁场时,电子束的径迹;

(3)保持出射电子的速度不变,增大或减小磁感应强度,电子束的径迹;

(4)保持磁感应强度不变,增大或减小出射电子的速度,电子束的径迹。

教师演示,学生观察实验,验证自己的预测是否正确。

实验现象:在暗室中可以清楚地看到,在没有磁场作用时,电子的径迹是直线;在管外加上匀强磁场(这个磁场是由两个平行的通电环形线圈产生的),电子的径迹变弯曲成圆形。磁场越强,径迹的半径越小;电子的出射速度越大,径迹的半径越大。

引导学生分析:当带电粒子的初速度方向与磁场方向垂直时,电子受到垂直于速度方向的洛伦兹力的作用,洛伦兹力只能改变速度的方向,不能改变速度的大小。因此,洛伦兹力对粒子不做功,不能改变粒子的能量。洛伦兹力对带电粒子的作用正好起到了向心力的作用。所以,当带电粒子的初速度方向与磁场方向垂直时,粒子在匀强磁场中做匀速圆周运动

思考与讨论:

带电粒子在匀强磁场中做匀速圆周运动,其轨道半径r和周期T为多大呢?

出示投影片,引导学生推导:

一带电量为q,质量为m ,速度为v的带电粒子垂直进入磁感应强度为B的匀强磁场中,其半径r和周期T为多大?如图所示。

粒子做匀速圆周运动所需的向心力F=m是由粒子所受的洛伦兹力提供的,所以

qvB=m

由此得出                       r=                   ①

周期T=   代入①式得         T=               ②

由①式可知,粒子速度越大,轨迹半径越大;磁场越强,轨迹半径越小,这与演示实验观察的结果是一致的。

由②式可知,粒子运动的周期与粒子的速度大小无关。磁场越强,周期越短。

 介绍带电粒子在汽泡室运动的径迹照片,让学生了解物理学中研究带电粒子运动的方法。

 

 

 

教师引导学生对结果进行讨论,让学生了解有关质谱仪的知识。让学生了解质谱仪在科学研究中的作用。

2、回旋加速器

 引导学生阅读教材有关内容,了解各种加速器的发展历程,体会回旋加速器的优越性。

课件演示,回旋加速器的工作原理,根据情况先由学生讲解后老师再总结。

在讲解回旋加速器工作原理时应使学生明白下面两个问题:

(1)在狭缝AA′与AA之间,有方向不断做周期变化的电场,其作用是当粒子经过狭缝时,电源恰好提供正向电压,使粒子在电场中加速。狭缝的两侧是匀强磁场,其作用是当被加速后的粒子射入磁场后,做圆运动,经半个圆周又回到狭缝处,使之射入电场再次加速。

(2)粒子在磁场中做圆周运动的半径与速率成正比,随着每次加速,半径不断增大,而粒子运动的周期与半径、速率无关,所以每隔相相同的时间(半个周期)回到狭缝处,只要电源以相同的周期变化其方向,就可使粒子每到狭缝处刚好得到正向电压而加速。

(四)实例探究

带电粒子在匀强磁场中的匀速圆周运动

【例1】一个负离子,质量为m,电量大小为q,以速率v垂直于屏S经过小孔O射入存在着匀强磁场的真空室中,如图所示。磁感应强度B的方向与离子的运动方向垂直,并垂直于图中纸面向里。

(1)求离子进入磁场后到达屏S上时的位置与O点的距离。

(2)如果离子进入磁场后经过时间t到达位置P,证明:直线OP与离子入射方向之间的夹角θt的关系是

 

 

 

 

 

 

【例2】如图所示,半径为r的圆形空间内,存在着垂直于纸面向里的匀强磁场,一个带电粒子(不计重力),从A点以速度v0垂直磁场方向射入磁场中,并从B点射出,∠AOB=120°,则该带电粒子在磁场中运动的时间为_______

A.2πr/3v0                                                    B.2πr/3v0

C.πr/3v0                                                      D.πr/3v0

 

【例3】电子自静止开始经MN板间(两板间的电压为u)的电场加速后从A点垂直于磁场边界射入宽度为d的匀强磁场中,电子离开磁场时的位置P偏离入射方向的距离为L,如图所示。求匀强磁场的磁感应强度。(已知电子的质量为m,电量为e

 

 

 

  

 

完成P108“问题与练习”第1、2、5题。书面完成第3、4题。

 

 

        

  

 

 

试题详情