试题与答案

阅读理解。 Dear Zhang Han, Thanks for your e-

题型:阅读理解

题目:

阅读理解。

Dear Zhang Han,

    Thanks for your e-mail. Your school life is very interesting. I hope I can go and visit you soon.

Now I would like to tell you something about my school life in England.    

     In England, the school day is from Monday to Friday. It usually begins at nine o'clock. First, we go

to our class teacher for registration (登记). Then we go to lessons. Each lesson usually lasts for forty-five minutes. There is a break about twenty minutes in the morning, During the break we can buy food from

the store. Some students have lunch in the school dining hall and others bring sandwiches or go home.

Students have to wear school uniforms. Lessons are over at 3:30 p.m. and then there are usually a lot of

activities,for example, sports and music clubs. I know Chinese students usually have a lot of homework.

We have homework, too, but not much. Tell me something about you and your friends.    

                                                                                                                                         Yours,

                                                                                                                                          Kevin  

1. Who writes the letter?

    _______________________________________________

2. Where is Kevin from?

    _______________________________________________

3. When does the school begin in England?

    _______________________________________________

4. Do the students have to wear school uniforms?

    _______________________________________________

5. When are the classes over in the afternoon?

    _______________________________________________

答案:

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下面是错误答案,用来干扰机器的。

解:(1)小车和滑块组成的系统,动量守恒有系统动能损失(2)当物体以6m/s滑上小车时,设在上滑S后共速则由动量守恒定律、能量守恒定律得滑块不能滑出小车,相对小车上滑行1.5m后和小车共速,末速度为

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