问题 单项选择题 A1/A2型题

气体在肺的交换。O2和CO2的扩散都极为迅速()

A.仅需约0.1s即可达到平衡

B.仅需约0.2s即可达到平衡

C.仅需约0.3s即可达到平衡

D.仅需约0.4s即可达到平衡

E.仅需约0.5s即可达到平衡

答案

参考答案:C

阅读理解

阅读理解。

     There was little rain in some place for two years and a lot of people died of hunger. So a man reported a famine(饥荒)to an official(官员). The official asked, "How much wheat have you harvested?" 

     "Thirty percent of the normal yield(正常产量的30%)," the man replied.

     "How much cotton?"

     "Twenty percent." 

     "How much rice?"

     "Twenty percent."

     The official got mad, "You’ve already had seventy percent of the harvest, how dare(敢)you trump up(谎报)famine then?" 

     The man said, "I’ve never seen such a terrible famine in my life of a hundred and several scores of

years." 

     "How could you have lived so long?" asked the official.

     "Look, I’m over seventy years old. My eldest son is over forty and my second son is over thirty. The

total(总数)is a hundred and several scores of years." All the people hearing this had a good laugh over

that.

1. A great ______ happened in the place.

A. flood

B. disease

C. drought

D. war

2. The man said ______.

A. people had a bad harvest

B. some of the crops were bad

C. people lost their farms

D. people had little food

3. The word “mad” in the story means ______.

A. sad

B. angry

C. happy

D. excited

4. The official didn’t think ______.

A. the people were hungry

B. the drought was serious enough

C. the people had to be helped

D. the famine was terrible enough

5. Hearing the clever answer, people laughed at ______.

A. the old man

B. the official

C. the hungry people

D. the policemen nearby the road

判断题