问题 问答题

“水往低处流”是一自发过程,在无外界影响时,它的逆过程是否可实现?你由这一自然现象受到什么启示?

答案

解:不能实现.根据热力学第二定律,一个过程若可以自发地进行,那么它的逆过程就不能自发进行;若逆过程发生,必会带来其他影响.“水往低处流”的逆过程是“水往高处流”,要使此现象出现,就需要借助其他手段的帮助如用抽水机等,结果消耗了电能,这就是此事件带来的“其他影响”.由此可体会到“自然界中出现的宏观过程都是不可逆过程”的含义.

阅读理解

阅读理解。

       James is a good student and he has lots of friends, but he also has a problem. Some older boys are bullying

(欺负) him at school. James is very unhappy and he doesn't know what to do about it. Here are some

suggestions to him and other teenagers in this situation. 

       Don't feel worried. It's not your fault (过错)! Being bullied can make you feel very lonely and angry, but

you are not alone. Don't feel that you have to hide the problem. You should find a person you can trust, and tell

them. It might be your teacher, your parents, or even your friend's parents. After you tell someone, you will get

some support and feel some relief (解脱). 

       Speaking to an adult might make you nervous, but here are other things you can do. Some people express

their feelings more easily on paper. Write a letter to someone or keep a diary. Include all the details (细节) about

what the bullies do, as well as when and where the bullying happens. You can use it as proof to show what is

going on. And it is a wonderful idea to show your letter or diary to a teacher or another responsible adult. Then

the bullies will feel very afraid if their names appear in a letter! 

       Also, don't show you are sad and don't try and fight with the bullies. You could get in trouble yourself.

Ignore them and just walk away. The bullies will soon stop.

1. What do you think the text is trying to tell us? [ ]

A. What to do about being bullied.

B. How to be a good student at school.

C. What to write well in a diary.

D. How to give suggestions to teenagers.

2. Why does the text advise you not to feel worried if bullied? [ ]

A. Because you are not alone.

B. Because it is not your fault.

C. Because someone has known about it.

D. Because you' re doing something wrong.

3. You'd better go and find a person you can trust and              . [ ]

A. know what happens

B. learn from them

C. ask for help

D. make them lonely

4. If you remember and follow the suggestions above,              . [ ]

A. nobody will speak to the bullies

B. everybody will feel some relief

C. someone will express their feelings

D. the bullies will soon stop

5. What does the underlined word "ignore" mean in the text? [ ]

A. take no notice of

B. take care of

C. make full use of

D. get more help from

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