（4分）一定温度下，在2L的密闭容器中，X、Y、Z三种气体的物质的

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问题计算题

（4分）一定温度下，在2L的密闭容器中，X、Y、Z三种气体的物质的量随时间变化的曲线如下图所示，请回答下列问题：

（1）反应开始到10s，用X表示的反应速率为

（2）反应的化学方程式为

答案

ν(X)=ν(Y)=0.0395mol／(L·s) X（g）+Y（g） 2Z（g）

填空题

用括号内所给单词的适当形式填空.

1. When I was a child , I was __________ (interest) in music.

2. The little boy is quite shy . He is __________ (terrify) of speaking in public.

3. Jane has got a warm and __________ (outgo) personality.

4. I heard such a __________ (fun) joke last night.

5. The local people there are very __________. (friend)

6. Her __________ (big) problem is that she can't sleep well at night.

7. My father always spends too much time __________ (watch) TV.

8. Do you like __________ (paint) pictures?

9. I __________ (real) miss my friend Joan. She moved to another city.

10. My partner used to be afraid of __________ (be) alone.

判断题

不锈钢能用氧气-乙炔火焰切割。