问题 选择题

下列有关说法正确的是                         (   )

A.汽车尾气中的一氧化氮遇空气在低温下能自发进行反应,说明该反应的ΔH>0

B.纯碱溶于热水中,去油污效果增强,说明纯碱的水解是放热反应

C.为保护海轮的船壳,常在船壳上镶入锌块

D.以熔融Al2O3为电解质进行电解冶炼铝,熔融体中Al3+向阳极移动

答案

答案:C

题目分析:A.汽车尾气中的一氧化氮遇空气在低温下能自发进行反应,根据ΔG=ΔH-TΔS<0,说明该反应的ΔH<0;B.纯碱溶于热水中,去油污效果增强,说明纯碱的水解是吸热反应,不是放热反应; C.为保护海轮的船壳,常在船壳上镶入锌块,锌块与船壳构成原电池的两极,锌块为阳极,保护阴极船壳; D.以熔融Al2O3为电解质进行电解冶炼铝,熔融体中Al3+是阳离子,向阴极移动。

阅读理解

根据短文内容完成下列任务。

  Mr Black was the manager (经理) of a hotel in the city. On a Friday night, three men came into

the hotel and asked for rooms. Mr Black said there were no rooms ready because of a meeting. The

men were unhappy.

  Mr Black wanted to help them. He remembered that Room 418,a small room, was empty(空的).

He asked them if they would like a small room. The three men said yes. Mr Black said they should pay

thirty dollars, ten for each one. Each man gave him the money and then went up to the room.

  Mr Black soon began to feel sorry, so he called his assistant over,gave him five dollars and said,

"Take the money to those three men in Room 418.I asked too much for their room. "

  The assistant took the money. (A)在去那儿的路上想,"How can the three men divide the five

dollars? I will give them each only one dollar and keep two dollars for myself.

  The men will be happy to get something back.And Mr Black will never know." So the assistant

returned one dollar to each man.

  The next morning, the three men went to thank the manager before they left. They said, "Thank

you for returning 3 dollars to us. "Mr Black was surprised but he didn't say anything.

      After the three men left, Mr Black called the assistant to his office and said,"(B)I am sorry, but I

don't think you can work here any more."  

任务一:翻译句子。

1. 将划线部分(A)处翻译成英语。

   ____________________________

2. 将划线部分(B)处翻泽成汉语。

   ____________________________

任务二:选择填空。

3. The  underlined  word "divide"  means "_____"in Chinese.

A. 利用    

B. 保存    

C. 赚到    

D. 分配

任务三:回答问题。

4. How much did Mr Black think the three men  should pay for the room later?

    ___________________________

5. When did the three men leave the hotel? 

   ___________________________

改错题