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问题 多项选择题

采光质量是采光标准的主要内容，采光质量包括（）

A、采光饱和度

B、采光均匀度

C、防止眩光

D、合适的光反射比

E、防止紫外线进入

答案

参考答案：B, C, D, E

补全对话，情景问答

补全对话。逻辑排序排列。

1. Well, I don't like thrillers. They're scary. And action movies are boring. What kind of movies do you

      like? 

2.  What kind of movies do you like? 

3.  Don't you like thriller and action movies? 

4.  Well, I like comedies, because I like funny movies. 

5.  That sounds fun! Let's go! 

6.  Thrillers, comedies and action movies. Do you want to go to a movie?

    正确的顺序: _____
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问答题

设z=z(x，y)有二阶连续偏导数，且满足

(Ⅰ)作自变量与因变量变换：u=x+y，υ=x-y，ω=xy-z．变换z的方程为ω关于u，υ的偏导数满足的方程．

(Ⅱ)求z=z(x，y)．
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