问题 选择题

如图所示,常温下有两个烧杯,分别盛有冰块和热水,一会儿可以明显地看到(  )

A.两块玻璃板外侧均有小水珠

B.两块玻璃板内侧均有小水珠

C.A玻璃板内侧、B玻璃板外侧均有小水珠

D.A玻璃板外侧、B玻璃板内侧均有小水珠

答案

(1)A杯中放的是冰块,杯外的水蒸气遇到温度较低的玻璃板液化成小水珠附着在玻璃的外侧;

(2)B杯中装的是热水,杯内温度高,杯内的水蒸气遇到温度较低的玻璃板液化成小水珠附着在玻璃的内侧.

故选D.

阅读理解

阅读理解。

     We often hear people talking about a generation gap (代沟). The name is new, but the idea

is old. Young people and their parents don't understand each other. The world has always kept

changing. During the second century after Christ a wise man said, "Bury me on my face because

in a little while everything will be turned upside down."

    There has always been a gap between generations, but more people talk about it now. Old

Mr. Ellis thinks he understands what has happened.

    "When I was a boy, I thought the world was a beautiful place. My life was very pleasant. But

when I was older, I learned about people who were treated badly, people who didn't have enough

to eat. I wanted to help them, and I married a girl who wanted to help them, too. We went to

meetings and talked a lot, but it didn't seem to make much difference. "

    "Our children grew up in a world at war. They didn't know when the fighting would stop. They

wanted their children to have nice clothes and toys. They didn't want to think about the future.

They thought nothing could be done about it."

    "Now I have grandchildren, and they have their own ideas. They are trying to make the world

better. They are trying to help other people. They're making people listen to them. I am proud

of their generation."

1. The wise man mentioned in the text told people to bury him on his face so that when everything

is turned upside down he will _____.

A. lie on his stomach        

B. lie on his back

C. stand quietly        

D. sit in peace

2. Which generation did NOT want to do anything to make the world a better one?

A. Mr. Ellis' generation      

B. His children's generation

C. His grandchildren's generation  

D. None of the above.

3. Which generation is/was more efficient in making the world better one?

A. Mr. Ellis' generation.          

B. His children's generation.

C. His grandchildren's generation.

D. None of the above.

4. What is the writer's attitude towards the generation gap?

A. Unacceptable.    

B. Awful.    

C. Funny.      

D. Common.

选择题