摘要:Ⅰ.合成苯甲酸甲酯粗产品 在圆底烧瓶中加入12.2g苯甲酸和20ml甲醇(密度约0.79g·),再小心加入3mL浓硫酸.混匀后.投入几粒碎瓷片.小心加热使反应完全.得苯甲酸甲酯粗产品. (1)浓硫酸的作用是 , 若反应产物水分子中有同位素.写出能表示反应前后位置的化学方程式 . (2)甲和乙两位同学分别设计了如右下图两套实验室合成苯甲酸甲酯的装置(夹持仪器和加热仪器均已略去). 根据有机物的沸点.最好采用 装置. 理由是 . (3)反应物应过量.理由是 . Ⅱ.粗产品的精制 (4)苯甲酸甲酯粗产品中往往含有少量甲醇.硫酸.苯甲酸和水等.现拟用下列流程进行精制.请在流程图中方括号内填入恰当操作方法的名称. (5)以上流程中加入溶液后.放入分液漏斗中振荡.静置.要得到有几层.其具体操作是: . (6)通过计算.苯甲酸甲酯的产率为 .

网址:http://m.1010jiajiao.com/timu3_id_2496006[举报]


第二部分:阅读理解(共20 小题。第一节共15 小题,每题2分;第二节共5 题,每题2分;共40 分)
阅读下列短文,从每题所给的四个选项  A.B.C.D中选出最佳选项。
A
Unnoticed and unappreciated for five decades,a large female turtle (龟)with a stained(彩色的),leathery(粗而硬的) shell is now a precious commodity(物品)in Changsha’s old zoo.She is fed on a special diet of raw meat.Her small pool has been covered with glass which can defend it from bullets.A special camera monitors her movements.A guard is posted at night.
The purpose is simple:the turtle must not die.
Earlier this year,scientists concluded that she was the planet’s last known female Yangtze giant soft shell turtle.She is about 80 years old and weighs almost 90 pounds.
As it happens,the planet also has only one known male.He lives at a zoo the city of Suzhou.He is 100 years old and weighs about 200 pounds.They are the last hope of saving a species believed to be the largest freshwater turtles in the world.
“It’s a very dangerous situation,” said Peter Pritchard, a famous turtle expert in the United States,who has helped try to save the species.、
For many Chinese people,the turtle is the symbol of health and long life,but the last two Yangtze giant soft-shell creatures show the threatened state of wildlife and biodiversity(生物多样性)in China.Pollution, hunting and over development are destroying natural habitats,and also endangering the plant and the animal population.
China contains some of the world’s richest treasures of biodiversity, yet the latest major survey of plants and animals shows a discouraging picture.Nearly 40 percent of all mammal species in China are now endangered, Scientists say.For plants,the situation is worse;70 percent of all nonflowering plant species and 86 percent of flowering species are considered threatened.
46.Why is the turtle in Changsha specially cared?
A.She has been unnoticed and unappreiated five decades.
B.She can be sold at a high price.
C.She is the planet’s last known female Yangtze giant soft-shell turtle.
D.She is old and heavy.
47.Which of the following statements is TRUE according to the text?
A.The turtle in Changsha is precious because it is the symbol of health and long life.
B.Peter Pritchard believes the female turtle is the largest freshwater turtle in the world.
C.The female turtle is in a dangerous situation where she may be killed.
D.The female turtle in Changsha and the male turtle in Suzhou are the last hope of saving the largest freshwater turtle species in the world.
48.According to the text ________in China.
A.there are the richest species of living things
B.wild plants and animals are becoming fewer
C.turtles are specially protected
D.the situation of plants is better than that of mammal species
49.The last paragraph proves the threatened state of wildlife and biodiversity in China by__________ .
A.facts and numbers                      B.Peter Pritchard’S words
C.teaching theory                        D.telling a story

查看习题详情和答案>>

Write NO MORE THAN THREE WORDS for each answer.

 

 

Babies, especially newborns, have the smoothest and most sensitive skin, and react to almost everything that touches them. This is why we have to be sure that whatever they come into contact with doesn’t have any bad effect on their skin.

Organic (有机的) newborn clothes are gaining popularity these days for being made from organic, non-synthetic (合成的) materials produced without pesticides (农药) or fertilizers(化肥).

Organic clothes are produced from organically-grown cotton on fields. We want only what is best for our babies, and organic clothes for newborns can help protect them from being exposed to the poisonous substances sometimes present in the clothes we normally wear. We don’t want our babies to get rashes (皮疹) just because we weren’t wise enough when buying their clothes!

What else do they offer? They wash more easily than ordinary clothes, giving better value for money in the long run. Ordinary clothes cost less, but the material they are made from is subject to frequent wear and tear even before it is made into clothes. In the long run, then, organic clothes are not only better for your child, but also more cost-effective, and remain fresh and in good repair after many years of use.

You may think that organic clothes must be dull and lifeless; nothing could be further from the truth. Modern techniques enable these clothes to be designed in attractive and brilliant colors with adorable patterns. Your clothes are not only safe, but beautiful as well!

In short, organic clothes are definitely an option to keep in mind when you’re shopping for that soon-to-arrive member of your family.

Why Choose1.for Newborns Babies have skin that is extremely2.to what touches it.

The reasons for their3.:

★They are made from organic, non-synthetic materials produced without4..

★They are much healthier than the ordinary options.

The5.of organic clothes:

★They keep babies away from the6.in the clothes.

★They are7.than common clothes.

★They can stand extensive wear and tear.

★They aren’t8.but cute and will never be out of fashion.

★They are designed in9.colors with adorable patterns.

★They are both10..

 

查看习题详情和答案>>


Recently a Beijing father sent in a question at an Internet forum (论坛) asking what "PK" meant.
"My family has been watching the 'Super Girl' singing competition TV program. My little daughter asked me what 'PK' meant, but I had no idea," explained the puzzled father.
To a lot of Chinese young people who have been playing games online, it is impossible not to know this term. In such Internet games, "PK" is short for "Player Kill", in which two players fight until one ends the life of the other.
In the case of the "Super Girl" singing competition, "PK" was used to refer to the stage where two singers have to compete with each other for only one chance to go up in competition ranking.
Like this father, Chinese teachers at high schools have also been finding their students' compositions using Internet jargons which are difficult to understand. A high school teacher from Tianjin asked her students to write compositions with simple language, but they came up with a lot of Internet jargons that she didn't understand.
"My 'GG' came back this summer from college. He told me I've grown up to be a 'PLMM'. I loved to 'FB' with him together; he always took me to the 'KPM'," went one composition. "GG" means Ge Ge (Chinese pinyin for brother). "PLMM" refers to Piao Liang Mei Mei (beautiful girl). "FB" means Fu Bai (corruption). "KPM" is short for KFC, Pizza Hut and McDonald's.
Some specialists welcome Internet jargons as a new development in language.
If you do not even know what a Kong Long (dinosaur, referring to an ugly looking female) or a Qing Wa (frog, referring to an ugly looking male) is, you will possibly be regarded as a Cai Niao!
45. By writing the article, the writer tries to  ________ .
A. explain some Internet language          B. suggest common Internet language
C. laugh at the Beijing father               D. draw our attention to Internet language
46. What does the writer think about the term "PK"?
A. Fathers can't possibly know it.          B. The daughter should understand it.
C. Online game players may know it.       D. "Super Girl" shouldn't have used it.
47. The examples of the Beijing father and the Tianjin teacher are used to show that Internet jargons ________ .
A. are used not only online                   B. can be understood very well
C. are welcomed by all the people          D. cause trouble to our mother tongue
48. The underlined word "jargons" means " ________ " in Chinese.
A. 行话               B. 粗口              C. 歌词               D. 趋势

查看习题详情和答案>>

第二部分:阅读理解(共20 小题。第一节共15 小题,每题2分;第二节共5 题,每题2分;共40 分)

阅读下列短文,从每题所给的四个选项  A.B.C.D中选出最佳选项。

A

Unnoticed and unappreciated for five decades,a large female turtle (龟)with a stained(彩色的),leathery(粗而硬的) shell is now a precious commodity(物品)in Changsha’s old zoo.She is fed on a special diet of raw meat.Her small pool has been covered with glass which can defend it from bullets.A special camera monitors her movements.A guard is posted at night.

The purpose is simple:the turtle must not die.

Earlier this year,scientists concluded that she was the planet’s last known female Yangtze giant soft shell turtle.She is about 80 years old and weighs almost 90 pounds.

As it happens,the planet also has only one known male.He lives at a zoo the city of Suzhou.He is 100 years old and weighs about 200 pounds.They are the last hope of saving a species believed to be the largest freshwater turtles in the world.

“It’s a very dangerous situation,” said Peter Pritchard, a famous turtle expert in the United States,who has helped try to save the species.、

For many Chinese people,the turtle is the symbol of health and long life,but the last two Yangtze giant soft-shell creatures show the threatened state of wildlife and biodiversity(生物多样性)in China.Pollution, hunting and over development are destroying natural habitats,and also endangering the plant and the animal population.

China contains some of the world’s richest treasures of biodiversity, yet the latest major survey of plants and animals shows a discouraging picture.Nearly 40 percent of all mammal species in China are now endangered, Scientists say.For plants,the situation is worse;70 percent of all nonflowering plant species and 86 percent of flowering species are considered threatened.

46.Why is the turtle in Changsha specially cared?

A.She has been unnoticed and unappreiated five decades.

B.She can be sold at a high price.

C.She is the planet’s last known female Yangtze giant soft-shell turtle.

D.She is old and heavy.

47.Which of the following statements is TRUE according to the text?

A.The turtle in Changsha is precious because it is the symbol of health and long life.

B.Peter Pritchard believes the female turtle is the largest freshwater turtle in the world.

C.The female turtle is in a dangerous situation where she may be killed.

D.The female turtle in Changsha and the male turtle in Suzhou are the last hope of saving the largest freshwater turtle species in the world.

48.According to the text ________in China.

A.there are the richest species of living things

B.wild plants and animals are becoming fewer

C.turtles are specially protected

D.the situation of plants is better than that of mammal species

49.The last paragraph proves the threatened state of wildlife and biodiversity in China by__________ .

A.facts and numbers                      B.Peter Pritchard’S words

C.teaching theory                        D.telling a story

 

查看习题详情和答案>>

Recently a Beijing father sent in a question at an Internet forum (论坛) asking what "PK" meant.

"My family has been watching the 'Super Girl' singing competition TV programme. My little daughter asked me what 'PK' meant, but I had no idea," explained the puzzled father.

To a lot of Chinese young people who have been playing games online, it is impossible not to know this term. In such Internet games, "PK" is short for "Player Kill", in which two players fight until one ends the life of the other.

In the case of the "Super Girl" singing competition, "PK" was used to refer to the stage where two singers have to compete with each other for only one chance to go up in competition ranking.

Like this father, Chinese teachers at high schools have also been finding their students' compositions using Internet jargons which are difficult to understand. A high school teacher from Tianjin asked her students to write compositions with simple language, but they came up with a lot of Internet jargons that she didn't understand.

"My 'GG' came back this summer from college. He told me I've grown up to be a 'PLMM'. I loved to 'FB' with him together; he always took me to the 'KPM'," went one composition.

"GG" means Ge Ge (Chinese pinyin for brother). "PLMM" refers to Piao Liang Mei Mei (beautiful girl). "FB" means Fu Bai (corruption). "KPM" is short for KFC, Pizza Hut and McDonald's.

Some specialists welcome Internet jargons as a new development in language.

If you do not even know what a Kong Long (dinosaur, referring to an ugly looking female) or a Qing Wa (frog, referring to an ugly looking male) is, you will possibly be regarded as a Cai Niao!

1.By writing the article, the writer tries to  ________ .

A.explain some Internet language

B.suggest common Internet language

C.laugh at the Beijing father

D.draw our attention to Internet language

2.What does the writer think about the term "PK"?

A.Fathers can't possibly know it.

B.The daughter should understand it.

C.Online game players may know it.

D."Super Girl" shouldn't have used it.

3.The examples of the Beijing father and the Tianjin teacher are used to show that Internet jargons ________ .

A.are used not only online

B.can be understood very well

C.are welcomed by all the people

D.cause trouble to our mother tongue

4.The underlined word "jargons" means " ________ " in Chinese.

A.行话

B.粗口

C.歌词

D.趋势

 

查看习题详情和答案>>

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