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问题 单项选择题

分布系统规模定义为：（）付天线以下或仅覆盖电梯和地下室的为小系统。

A、10付

B、20付

C、30付

答案

参考答案：A

问答题

一位同学用“可乐瓶”做小孔成像实验，实验装置如图所示．

（1）请在图中的半透明纸上画出蜡烛火焰AB的像A′B′．

（2）该同学发现蜡烛和小孔的位置固定后，像离小孔越远，像就越大．他测出了像到小孔不同距离时的像的高度（见下表）．分析表中实验数据可看出h与s是什么关系？

像到小孔的距离s/cm2.04.36.010.011.714.0
像的高度h/cm1.02.23.05.05.87.0
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补全对话，情景问答
  从方框中选择适当的句子补全对话。

A. It seems that you are always very busy.
B. It's hard to say.
C. But  how  about your English?
D. It's very kind  of you.
E. Do you loke traveling?
F. What do you want to be in the future?
G. What's your idea?


Li Peng (L) and Yang Bin ( Y) are talking about what they are going to do in the future.  
L: What are you going to do when you are older?
Y: I hope I will become a pilot. That way I would travel around the world.
L: __1___
Y: Of course I do. I like to visit different places, make different friends and learn different things.
L: That sounds good. You look healthy. __2___
Y: It's just so-so. I find it hard to learn it well.
L: What can you do if you are not good at English?
Y: ___3__ I'll  try to learn it better. __4___
L: Maybe I'll be a businessman. I'd like to go shopping  and make some money.
Y: __5___
L: Because I think being busy is better than doing nothing.
Y: Yes. I agree with you.
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