问题 选择题

冬天在户外的人呼出的“白气”是(     )

A.人呼出的水蒸气

B.人呼出的水蒸气遇冷液化形成的细小水珠。

C.空气中的水蒸气液化成细小水珠

D.人呼出的二氧化碳气体

答案

答案:B

分析:解决此题的关键是知道“白气”是细小的小水珠,属于液态,结合三种物质状态及液化的定义进行分析判断.

解答:解:A、人呼出的水蒸气是气体,而“白气”是液体,不符合题意;

B、人呼出的水蒸气遇冷液化变成小水滴,形成白气,符合题意;

C、空气中的水蒸气遇冷液化形成雾,不符合题意;

D、二氧化碳是气体,而“白气”是液体,不符合题意;

故选B.

阅读理解

An English traveler found himself in Norway with only enough money to buy the ticket for him to go back home. As he knew that it would take him only two days to get to England, he decided that he could easily spend the time without food. So he bought a ticket and got on the ship. The man closed his ears to the sound of the lunch bell. When dinnertime came, he didn’t go to dinning room, saying that he was not feeling very well.

  The next morning he still didn’t have breakfast and at lunchtime he again stayed in his room. But at dinnertime he was so hungry that he went to the dinning room and ate everything the waiter put in front of him. He got ready for the quarrel(争执).

  “Bring me the bill,” he said. “The bill, sir?” said the waiter in surprise. “There isn’t any bill. On our ship meals are included (包括) in the money for the ticket,” said the waiter.

小题1:The story happened _________.

A.in England

B.on a ship from Norway to England

C.in Norway

D.on a ship from England to Norway小题2:The traveler didn’t go to the dinning room first because __________.

A.he had no money

B.he didn’t feel very well

C.he didn’t want to eat anything

D.he didn’t hear the sound of the bell小题3:The traveler went to the dinning room to eat something because __________.

A.his friend had given him some money

B.the waiter had asked him to change his mind

C.he learned that there was no bill on the ship

D.he was too hungry小题4:After the traveler finished eating, __________.

A.he had a quarrel with waiter over the bill

B.he drank a lot

C.he asked the waiter to bring him the change(零钱)

D.he came to know that travelers on the ship had free meals

问答题