问题 选择题

从微观的角度分析,下列解释错误的是(  )

A.汽油挥发--分子在不断运动

B.食物腐烂--在化学变化中,分子本身不改变

C.用体温计量体温时水银柱升高--汞原子间间隔变大

D.湿衣服在阳光下干的快--温度越高,分子运动速率越快

答案

A、汽油挥发---是分子不断运动,分子的间隔变大,故A正确;

B、食物腐烂是化学变化,在变化中分子本身发生了改变,故B错误;

C、用体温计量体温时水银柱升高--汞原子受热,间隔变大,故C正确;

D、湿衣服在阳光下干的快是因为温度越高,分子运动速率越快,解释正确,故D正确.

故选B.

单项选择题
句型转换

请将下面的直接引语变成间接引语。

1. "Whenever my father is unhappy," Ann said, "he will go out and buy something, usually something

     large and useless.

                                                                                                                                                        

2. "In most countries Red Cross stands for humanitarianism (人道主义)," said Mr. Jackson.

                                                                                                                                                        

3. "You must leave a note for your mother," said Mabel, "otherwise, she'll be terribly worried when you're

     not in at your usual time."

                                                                                                                                                         

4. "You can leave your motor cycle in my garage if you like," Mr. Corder said, "I'll keep an eye on it while

     you're away."

                                                                                                                                                         

5. He said, "After the lecture I have to rush home."

                                                                                                                                                         

6. Mary said, "I'm starting the work the day after tomorrow."

                                                                                                                                                          

7. He said, "If what you said is true I must go to the police." 

                                                                                                                                                           

8. "I know the umbrella belongs to you, but I thought it would be all right if I borrowed it," said my nephew.

                                                                                                                                                           

9. "You mustn't forget to put the stamp on or your friend will have to pay double postage (邮资)," he told me. 

                                                                                                                                                           

10. "I've left some books on your table," said Tom. "I think you'll find them useful. You can keep them as

       long as you need them, but I'd like them back when you've finished with them."