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问题 单项选择题

向原电池（一）Ag，AgCl│Cl-‖Ag+│Ag（+）的负极中加入NaCl，则原电池电动势的变化是：（）

A.变大

B.变小

C.不变

D.不能确定

答案

参考答案：A

解析：

填空题

根据句意和所字母填空。

1. Don't l_____ at others when they make a mistake.

2.  He is better at playing tennis, so he always b_____ me in tennis.

3.  I have a good friend.  Our f_____ will last for ever.

4.  English is very important.  It's n_____ for us to learn it well.

5.  -Would you like to play football after school?

    -I'd love to.  But I have to finish my s_____ at first.

6.  My little brother is nine years old and now he studies in a p_____ school.

7.  Our Chinese teacher is very s_____.  We are a little afraid of him.

8.  Tina is o_____.  She likes to stay with friends and enjoys going to parties.

9.  Li Lei often does exercises, so he is very a_____ .

10.  Our friends and I have the same i_____  such as playing football,  watching TV and so on.
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选择题

People ____ any flowers until May.[ ]

A. will see

B. don't see

C. won't see

D. see

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