问题 选择题

关于大气压强,下列说法中错误的是[ ]

A. 大气压强等于76cm水银柱高

B. 大气压是由于空气重力而产生的

C. 大气密度大时,气压也较大

D. 大气压随高度降低而变大

答案

答案:A

阅读理解

阅读理解:

      Once there was an old man in a town. He always forgot a lot of things. So his wife always had to say to

him, "Don't forget this!" 

      One day he went on a long trip alone. Before he left home, his wife said, "Now you have all these things.

They are what you need for your trip. Take care of your things during the trip." He went to the station, bought

a ticket and got on the train with it.

      About half an hour later, the conductor began to see the tickets. He came to the old man and said, "Will you

please show me your ticket?" The old man looked for his ticket in all his pockets, but he could not find it. He

was very worried. "I can't find my ticket. I really bought a ticket before I got on the train." said the old man. 

      "I believe you bought a ticket. All right, you don' t have to buy another one," said the conductor kindly. "But

how can I know where I'm going? I can't remember my station!" the old man said sadly.

1. The old man in the story was very ________. [ ]

A. kind

B. poor

C. forgetful (健忘的)

D. sad

2. Where is the ticket? [ ]

A. The old man forgot go buy it.

B. The old man could not remember where it was.

C. The old man showed it to the conductor.

D. The old man's wife took the ticket away.

3. The old man bought the ticket _______ he got on the train. [ ]

A. after

B. before

C. as

D. when

4. The conductor the old man _______. [ ]

A. didn't believe

B. laughed at

C. believed

D. felt sorry for

5. The old man was sad because ________. [ ]

A. he had to buy another ticket.

B. he lost all the things his wife gave him.

C. he did not know where he was.

D. He did not know where he should get off.

单项选择题