湖北省省实验中学2009届高三年级理科综合能力测试（十）        命题人：黄琼 高晓军 龙信和        时间：150分钟  总分300分

第I卷（共126分）

以下数据可供解题时参考：相对原子质量（原子量）： Mg   24； Al  27

试题详情

本资料来源于《七彩教育网》http://www.7caiedu.cn

《解三角形》

试题详情

海南省国兴中学 海师附中 嘉积中学 三亚一中2009年高三联考物理科试卷

注意事项：

1．本试卷分第I卷（选择题）和第II卷（非选择题）两部分。答卷前，请考生务必将自己的姓名、准考证号填写在答题卡上。

2．回答第I卷时，选出小题答案后，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，用再选涂其它答案标号。写在本试卷上无效。

3．回答第II卷时，将答案写在答题卡上。写在本试卷上无效。

4．考试结束后，将本试卷和答题卡一并交回。

第Ⅰ卷（选择题，共34分）

试题详情

揭阳华侨中学高三物理练习题 2009-05-07

1.下面列举的事例中正确的是(     ).

A．居里夫妇用α粒子轰击铝箔时发现了正电子

B．卢瑟福的原子结构学说成功地解释了氢原子的发光现象

C．麦克斯韦从理论上预言了电磁波的存在,赫兹用实验方法给予证实

D．玻尔建立了量子理论,解释了各种原子发光现象

2.氢原子的核外电子从一个轨道跃迁到另一轨道时,可能发生的情况有

A．放出光子,电子动能减少,原子势能增加

B．放出光子,电子动能增加,原子势能减少

C．吸收光子,电子动能减少,原子势能增加

D．吸收光子,电子动能增加,原子势能减少

3.如图所示,一验电器与锌板相连,现用一弧光灯照射锌板,关灯后,指针保持一定偏角,下列判断中正确的是

A．用一带负电(带电量较少)的金属小球与锌板接触,则验电器指针偏角将增大

B．用一带负电(带电量较少)的金属小球与锌板接触,则验电器指针偏角将减小

C．使验电器指针回到零后,改用强度更大的弧光灯照射锌板,验电器指针偏角将比原来大

D．使验电器指针回到零后,改用强度更大的红外线灯照射锌板,验电器指针一定偏转

4．放在光滑水平面上的物块1、2用轻质弹簧秤相连，如图所示．今对物块1、2分别施以相反的水平力F₁ 、F₂．且F₁大于F₂，则弹簧秤的示数

A．一定等于F₁＋F₂

B．一定等于F₁－F₂               

C．一定大于F₂小于F₁

D．条件不足，无法确定

5．如图所示，斜面体P放在水平面上，物体Q放在斜面上．Q受一水平作用力F，Q和P都静止．这时P对Q的静摩擦力和水平面对P的静摩擦力分别为f₁、f₂．现使力F变大，系统仍静止，则

A． f₁、f₂都变大           B．f₁、f₂都不一定变大

C． f₁变大，f₂不一定变大   D． f₂变大，f₁不一定变大 

6．如图所示，质量为m的木块在质量为M的长木板上向右滑行，木块同时受到向右的拉力F的作用，长木板处于静止状态；已知木块与木板间的动摩擦因数为μ₁，木板与地面间的动摩擦因数为μ₂，则

A．木板受到地面的摩擦力的大小一定是μ₁mg

B．木板受到地面的摩擦力的大小一定是μ₂（m十M）g

C．当F＞μ₂（m＋M）g时，木板便会开始运动

D．无论怎样改变F的大小，木板都不可能运动

7．如图所示，在台秤的托盘上放着一个支架，支架上挂着一个电磁铁A，电磁铁的正下方有一铁块B，电磁铁不通电时，台秤示数为G，当接通电路，在铁块被吸起上升的过程中，台秤的示数将                                           

A．不变                                       B．变大

C．变小                                           D．忽大忽小

8．如图所示，甲、乙两电路中电源完全相同，电阻R₁>R₂，在两电路中分别通过相同的电量Q的过程中，下列关于两电路的比较，正确的是

  A．电源内部产生电热较多的是甲电路中的电源

  B．R₁上产生的电热比R₂上产生的电热多

  C．电源做功较多的是乙电路中的电源

  D．电源输出功率较大的是乙电路中的电源

9.如图所示，一个带负电的油滴以初速v₀从P点倾斜向上进入水平方向的匀强电场中，若油滴到达最高点时速度大小仍为v₀，则油滴最高点的位置在

A．P点的左上方     B．P点的右上方

C．P点的正上方     D．上述情况都可能

10．如图所示，在圆形区域内存在一垂直于纸面向里的匀强磁场，一束速率各不相同的质子从A点沿磁场圆形边界的半径方向射入磁场。关于质子在该磁场内运动过程的说法正确的是

A．运动时间越长的，其轨迹越长

B．运动时间越长的，其射出磁场时的速率越大

C．运动时间越长的，其轨迹对应的圆心角越大

D．运动时间越长的，其速度方向的偏转角越大

11．如图所示，宽h=2cm的有界匀强磁场，纵向范围足够大，磁感应强度的方向垂直纸面向内，现有一群正粒子从O点以相同的速率沿纸面不同方向进入磁场，若粒子在磁场中做匀速圆周运动的轨道半径均为r=5cm，则

A．右边界:-4cm<y<4cm有粒子射出

B．右边界:y>4cm和y<-4cm有粒子射出

C．左边界:y>8cm有粒子射出

D．左边界:0<y<8cm有粒子射出

12．如图所示，平行于纸面水平向右的匀强磁场，磁感应强度B₁＝1T。位于纸面内的细直导线，长L＝1m，通有I＝1A的恒定电流。当导线与B₁成60⁰夹角时，发现其受到的安培力为零。则该区域同时存在的另一匀强磁场的磁感应强度B₂大小可能值

A．T      B．T   

C．1 T       D．T

13．(Ⅰ) (10分)某同学设计了一个探究加速度与物体所受合力F及质量m间关系的实验．图（a）为实验装置简图，A为小车，B为打点计时器，C为装有砂的砂桶，D为一端带有定滑轮的长方形木板，实验中认为细绳对小车拉力F等于砂和砂桶总重力，小车运动加速度a可由纸带上点求得．

次   数

1

2

3

4

5

6

7

8

小车加速度a/ms^－2

1.90

1.72

1.49

1.25

1.00

0.75

0.50

0.30

小车质量m/kg

0.25

0.29

0.33

0.40

0.50

0.71

1.00

1.67

4.00

3.50

3.00

2.5

2.00

1.40

1.00

0.60

（1）图(b)为某次实验得到的纸带（交流电的频率为50Hz），由图中数据求出小车加速度值为          _________m/s²；

（2）保持砂和砂桶质量不变，改变小车质量m，分别得到小车加速度a与质量m及对应的数据如表中所示，根据表中数据，为直观反映F不变时a与m的关系，请在方格坐标纸中选择恰当物理量建立坐标系，并作出图线；

从图线中得到F不变时小车加速度a与 质量m间定量关系是_____________；

（3）保持小车质量不变，改变砂和砂桶质量，该同学根据实验数据作出了加速度a与合力F图线如图（C），该图线不通过原点，明显超出偶然误差范围，其主要原因是：

                                                                        .

 (Ⅱ)某同学用如图所示的实验装置探究小车动能变化与合外力对它所做功的关系。图中A为小车，连接在小车后面的纸带穿过打点计时器B的限位孔，它们均置于水平放置的一端带有定滑轮的足够长的木板上，C为弹簧测力计，不计绳与滑轮的摩擦。实验时，先接通电源再松开小车，打点计时器在纸带上打下一系列点。

（1）该同学在一条比较理想的纸带上，从点迹清楚的某点开始记为O点，顺次选取5个点，分别测量这5个点到O之间的距离，并计算出它们与O点之间的速度平方差：

 ，填入下表：

以为纵坐标，以s为横坐标在方格纸中作 

出图象.若测出小车质量为0.2kg，结合图 

象可求得小车所受合外力的大小为      N

（2）若该同学通过计算发现小车所受合外力小于测

力计读数，明显超出实验误差的正常范围．你认

为主要原因是                            ，

实验操作中改进的措施是                 

                                            。

14．在实验室中测量电源的电动势和内电阻，可以提供的器材有：

a）待测电池：电动势E（约3V）、内电阻r（约1Ω）

b）电压表V：量程15V，内电阻

c）电流表A₁：量程0.6A，内阻

d）电流表A₂：量程1mA，内阻r₂=200Ω

e）滑动变阻器R₁：阻值0―200Ω，额定电流1.5A

f）滑动变阻器R₂：阻值0―20Ω，额定电流1.5A

g）电阻箱R₃：9999Ω

以及开关，导线，坐标纸等。

为了尽可能准确地测量待测电池的电动势和内电阻：

①实验所用器材除了待测电池和导线、开关、坐标纸等，还需选择必要的器材有（填器材前的序号）               。

②画出测量电池电动势和内电阻的电路图。

③说明测量的主要实验步骤。（要求用图象法处理实验数据。）

15．如图，圆环质量为M，经过环心的竖直钢丝AB上套一质量为m的小球，今将小球沿钢丝AB以初速度v₀从A点竖直向上抛出，致使环对地面刚好无压力，求：

⑴ 小球上升的加速度。

⑵ 小球能达到的最大高度。（球不会碰到B点）

16．(16分)如图所示，MN为纸面内一竖直分界线，P、D是纸面内水平方向上的两点。两点之间的距离为L，D点距分界线的距离为，一质量为m、电量为q的带正电粒子在纸面内从P点开始以v₀的水平初速度向右运动，经过一段时间后在MN左侧空间加上垂直纸面向里的磁感应强度为B的匀强磁场，磁场维持t₀时间后撤除，随后粒子再次通过D点且速度方向竖直向下。粒子的重力不计，求：

  (1) 粒子在加上磁场前运动的时间t．    、

  (2) 满足题设条件的磁感应强度B的最小值及B最小时t₀的值．

试题详情

本资料来源于《七彩教育网》http://www.7caiedu.cn

  《算法初步》

试题详情

试题详情

2009届巢湖市第六中学高三

第六次月考

第一部分  听力（共两节，满分30分）

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。

1. Which is the first program the woman is planning to watch?

A. A movie.        B. A cartoon.     C. A football game.

2. What can we learn from this conversation?

A. The wind has stopped but it's still raining.    B. The rain stopped.

C. It's still raining and the wind is blowing.

3. What country does Suzanne presently call her home?

A. America.        B. England.       C. Spain.

4. Where does the conversation take place?

A. In the man's house.    B. In a dinning-room.    C. In a restaurant.

5. What job is the man poking for?

A. He wants to be with the computer center.

B. He wants to work at a computer servicing company.

C. He wants to work in the computer market department.

第二节 （共15小题；每题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，每小题将给出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 kind of car does the woman want?

A. A new car.      B. A second-hand car.     C. A cheap car.

7. What happened to the woman's car?

A. It broke down.   B. It was stolen.     C. It was given to her son.

听第7段材料，回答第8―9题。

8. What does David want Julie to do?

A. To tell him her telephone number.   B. To go out with him.   C. To visit him.

9. When will they meet?

A. On Sunday.     B. On Saturday.           C. On Thursday.

听第8段材料，回答第10―12题。

10. Which statement is right?

A. The exam yesterday was harder than the last one.

B. The exam yesterday was shorter than the last one.

C. The exam yesterday was as easy as the last one.

11. Why did Mary make some stupid mistakes?

A. Because he didn’t work hard.    B. Because she didn’t take many courses.

C. Because she was too careless.

12. Who is a better student?

A. Mary.      B. Jimmy.  C. The man.

听第9段材料，回答第13―16题。

13. Who is answering the call?

A. Mary.      B. Jean.     C. Anna

14. Why is Pat making the telephone call?

A. To tell his friend to attend a meeting.

B. To tell his friend to hand in the experiment report.

C. To tell his friend to come to work for the Chemistry Department.

15. Who is Jean?

A. Annals sister-in-law.   B. Mary's sister-in-law.   C. Pat's friend.

16. Which of the following do you think is true?

A. Pat knows Mary.    B. Jean knows Pat.    C. Anna doesn't know Pat.

听第10段材料，回答第17―20题。

17. What is the purpose of the talk?

A. To describe a college training course.   B. To employ people for a job.

C. To talk about problems the airline company faces.

18. According to the speaker, how many people are accepted for the training program every year?     A. About one thousand.   

B. Several thousand.   C. Fewer than one thousand.

19. What subject matter does the speaker mention is included in the training?

A. Psychology.         B. Physical language.  C. Geography.

20. Why does the speaker mention headwaiters?

A. To explain her previous job.

B. To describe the background needed by people asking for the job.

C. To describe some of the skills people working in the plane need.

­

第二部分：知识运用（共两节，满分45分）

第一节：单项填空（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。

21. ―_______ noise outside!   

―_______. I’ll close the doors and the windows. Now let’s go on.

A. What a; Not at all        B. How; That’s right

C. How; All right           D. What; Never mind

22. The hard-working farmers and their happy life we saw in the countryside________ us very much.

A. frightened          B. impressed            C. disappointed          D. expressed

23. Was it 8 o’clock _______ you heard someone _______ at the door?

A. when; knocking        B. when; knock             C. that; knocking           D. that; knock

24. No computer so far _______ can have the same ability as human brains.

A. be built                    B. having built                     C. being built                D. built

25. _______ Beijing you see today is quite _______ different city from what it used to be.

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

26. ― It was careless of you _______ your clothes outside all night. 

― My God! ______.

A. to leave; So did I     B. leaving; So do I

C. to have left; So I did D. having left; So do I

27. ― What do you think of the speech?    

― The speaker said _______ nothing worth _______.

A. nearly; listening to   B. hardly; listening

C. scarcely; listening to  D. almost; listening to

28. --I tried to get a hold of Ben last night, but it was so difficult to get through.

--_______. Maybe he was on the Net.

A. That’s probably it    B. That’s strange   C. That’s true D. I know why

29. ― When did he start?     ― He started _______ he got her letter.

A. the moment    B. as long as        C. since        D. until

30. No one would have time to read or listen to an account of everything _______ going on in the world.  

A. it is      B. as is      C. that is   D. what is

31. ― Would you mind _______ me the dictionary? 

― Of course not. But it is ______ my reach.

A. passing; out              B. passing; beyond        C. to pass; far away              D. to pass; out of

32. He was _______ today, but was asked to stay _______ week.

A. to have returned; another   B. returning; one more 

C. returned; another          D. to return; other

33. ―_______ helps others will be helped. 

― So I’ll be thankful to and try to help _______ has helped us.

   A. Whoever; whomever     B. Whoever; whoever 

C. Who; whoever              D. Who; whomever

34. ― Your sister nearly _______ all her spare time to her course during the three years.

   ― That’s right, or she_______ the first place in her school in the 2000 College Entrance Examination.   

A. spent; wouldn’t take    B. devoted; wouldn’t have taken

   C. hadn’t devoted; hadn’t taken  D. hadn’t spent; couldn’t take

35. She’s a teacher, _______ is clear from her manner.

A. that    B. what         C. as       D. who

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，掌握其大意，然后从短文后所给各题的四个选项(A、B、C和D)中，选出可以填入空白处的最佳选项。

There had been a big battle the day before and our army had taken the enemy's defence works. Night fell and we were in a trench (战壕) ____36____the enemy had dug as the last ____37____of defence. We could ____38____them digging a new trench ____39____in the distance. And by the morning we could see the ____40____of the spades (铲子) as they____41____the earth out.

   In our trench, some soldiers ____42____time shooting at the enemy spades to see ____43____they could hit any of them. Then one of the enemy soldiers ____44____our game. He would put his spade up suddenly and ____45____it there for a few seconds to see whether ____46____of us could hit it and then pull it down quickly. ____47____time he would do it in quite a ____48____place. A____49____of our soldiers shot at it ____50____it came up, but none of them ____51____to have hit it. Then there came a time when the spade ____52____down for much longer than ____53____. We thought that the soldier was ____54____from playing the game by an officer. But just ____55____we thought that we could not see the spade again, it came up once more with a bandage (绷带) tied around it.

36. A. where

B. which

C. since

D. when

37. A. result

B. line

C. moment

D. hope

38. A. watch

B. know

C. hear

D. observe

39. A. themselves

B. ever

C. our enemies

D. our game

40. A. tops

B. colors

C. shapes

D. bottoms

41. A. dug

B. carried   

C. threw

D. stole

42. A. spent

B. wasted  

C. grasped

D. enjoyed

43. A. who

B. if

C. how

D. weather

44. A. attends

B. won

C. joined

D. joined in

45. A. keep

B. kept

C. keeping

D. to keep

46. A. all

B. one

C. none

D. each

47. A. Next

B. Other

C. Last

D. Any

48. A. far

B. strange   

C. different

D. various

49. A. sort

B. kind

C. deal

D. number

50. A. suddenly

B. everywhere

C. only

D. whenever

51. A. honored

B. happened

C. expected

D. seemed

52. A. kept

B. remained

C. taken

D. hid

53. A. always

B. usual

C. the rule

D. their expect

54. A. ordered

B. forced

C. prevented

D. left

55. A. then

B. when

C. a minute

D. now

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A、B、C、D 四个选项中选出最佳选项。

A

The George Washington School had been standing for more than 100 years. The school building was in good shape, but behind it was an old basketball court. The court’s blacktop had been broken and was overgrown with weeds. The fence around the court was battered, and parts of it lay on the ground. The basketball hoops were bent and rusted.

One cold day in February, Mr. Garson, a biology teacher, was taking a walk during his lunch break. He passed the old basketball court. “What an ugly sight!” he said, groaning. As he stared at the empty court, he had a vision. He stopped and let the vision take shape in his imagination. In his mind, he pictured something quite different from what he actually saw.

Mr. Garson asked the school board for money to turn his vision into a reality. In April he organized a group of community volunteers to tear up the old basketball court and take it away. Then he persuaded a local farmer to bring truckloads of good topsoil free of charge, which several students spread over the field. A group of parents volunteered to build a new fence around the land. Mr. Garson bought some garden tools. He also bought seeds and young plants. In May students planted tomatoes, potatoes, corn, lettuce, onions, and peppers. In one place they planted a dozen kinds of flowers that would bloom through the summer and fall.

Two students checked the garden and watered it every day. On Saturdays throughout the summer, groups of students gathered to weed (除草) the garden and harvest what was ripe. In September students enjoyed eating fresh produce from the George Washington garden for lunch. Most days there were freshly cut flowers on the breakfast tables. In late fall a local farmer plowed under the garden so that it would be ready for planting again in the spring.

 “What a beautiful sight!” Mr. Garson announced a speech at the first school assembly. “It proves that we can change things if we work together toward a common goal.”

56. The best title of this passage is _______.

A. What a basketball court!   B. How hard the work is!

C. We need vegetables!       D. What a sight!

57. In this selection, the word “battered” means_______.

A. damaged   B. repaired   C. locked    D. high

58. What is one theme expressed in this selection?

A. It takes a lot of hard work to get large donations.

B. It is important to eat a lot of fresh fruits and vegetables.

C. You shouldn’t be discouraged if you don’t succeed right away.

D. One person with a vision can make a big difference.

59. How does Mr. Garson get topsoil for the garden?

A. He buys it.       B. The school board supplies it.

C. A local farmer donates it.  D. He finds it under the basketball court.

B

Creativity（创造性）is the key to a brighter future, say education and business experts. Here is how schools and parents can encourage this important skill in children.

    If Dick Drew had listened to his boss in 1925, we might not have a product that we now think or as of great importance: a new type of tape. Drew worked for the Minnesota Mining Company. At work he developed a kind of material strong enough to hold things together. But his boss told him not to think more about the idea. Finally, using his own time, Drew improved the tape, which now is used everywhere by many people. And his former company learned from its mistake. Now it encourages people to spend 15 percent of their work time just thinking about and developing new ideas.

    Creativity is not something one is just born with, nor is it necessarily a character of high intelligence（智力）.The fact that a person is highly intelligent does not mean that he uses it creatively. Creativity is the matter of using the resources one has to produce new ideas that are good for something.

Unfortunately, schools have not tried to encourage creativity. With strong attention to test results and the development of reading, writing and mathematical skills, many educators give up creativity for correct answers. The result is that children can give back information but can't recognize ways to use it in new situations. They may know the rules correctly, but they are unable to use them to work out practical problems.

It is important to give children choices. From the earliest age, children should be allowed to make decisions and understand their results. Even if it's choosing between two food items for lunch, decision-making helps thinking skills. As children grow older, parents should let their children decide how to use their time or spend their money, but not tell them too much if they make the wrong decision. The child may have a hard time, but that is all right. This is because the most important character of creative people is a very strong desire to find a way out of trouble.

60.What did the company where Drew once worked learn from its mistake？

  A. They encouraged people to work a longer time.

B. They discouraged people to think freely.

C. They asked people to spend all their work time developing new ideas.

D. They encouraged people to spend some of their work time considering and improving new ideas.

61. Creativity is something_______.

A. that people are born with       B. that depends on intelligence

C. that is a way of using what one has learned to work out new problems

D. that is not important at all

62.Why don't schools try to encourage creativity？

A. They don't understand the importance of education.

B. They don't want their students to think about anything

  C. They pay too much attention to examination marks, language and mathematical skills.

  D. They think it is very important to remember some information.

63.What should the parents do when their children decide how to spend their money？   A. Try to help them as much as possible

B. Take no notice of whatever they do.

  C. Help them if their decision is wrong, but not too much.

D. Leave them as they are.

C

Geologists have been studying volcanoes for a long time. Though they have learned a great deal, they still have not discovered the causes of volcanic action. They know that the inside of the earth is very hot, but they are not sure exactly what causes the great heat. Some geologists have thought that the heat is caused by the great pressure of the earth's outer layers(层). Or the heat may be left from the time when the earth was formed. During the last sixty years scientists have learned about radium, uranium (铀), thorium, and other radioactive elements(放射性元素). These give out heat all the time as they change into other elements. Many scientists now believe that much of the heat inside the earth is produced by radioactive elements.

Whatever the cause of the heat may be, we do know that the earth gets hotter the farther down we dig. In deep mines and oil wells the temperature rises about 1ㄈ for each 50 feet. At this rate the temperature 40 miles below the earth's surface would be over 4,000. This is much hotter necessary to melt(融化) rock. However, the pressure of the rock above keeps most materials from melting at their usual melting points. Geologists believe that the rock deep in the earth may be plastic, or puttylike. In other words, the rock yields (屈服) slowly to pressure but is not liquid. But if some change in the earth's crust releases the pressure, the rock melts. Then the hot, liquid rock can move up toward the surface.

 When the melted rock works its way close to the earth's crust, a volcano may be formed. The melted rock often contains steam and other gases under great pressure. If the rock above gives way, the pressure is released.

Then the sudden expansion(膨胀) of the gases causes explosion. These blow the melted rock into pieces of different sizes and shoot them high in the air. Here they cool and harden into volcanic ash. Some of the materials fall around the hole made in the earth's surface. The melted rock may keep on rising and pour out as lava. In this way, volcanic ash and lava build up the mountains that we call volcanoes.

64. The main idea of this passage is the _______.

A. interior (内部) of the earth   B. formation of volcanoes

   C. results of vocalic action      D. work of geologists

65. The cause for the heat in interior of the earth is_______.

A. radioactive elements     B. the great pressure of the earth

C. not determined   D. the heat remaining from the formation of the earth

66. If the temperature at the earth's surface is 20 ㄈ, the temperature in a coal mine 500 feet below the surface would, in degrees, _______.  

A. 30      B. 40        C. l20    D. 500

D

In cars of normal design, the petrol system is made up of three parts: storage tanks, a pump and a carburetor（汽化器）.

       The petrol tank is fitted at the back of the car where it is out of the way, yet easily filled at a gas station. Tanks are in various capacity but they usually hold enough petrol for 250~300 miles running. Because the tank is at the opposite end of the car from the carburetor, which is fitted high up on the engine, a pump is needed to draw the petrol from one to the other, as it is from the carburetor that the petrol in finally fed into the engine. Pumps can be of two kinds: electrically operated or mechanically driven from the engine.

67. Which of the following pictures shows the correct petrol system described in this passage?