已知（x-2）2+|y+1|=0，则x+y的值是（） A．1 B．-1 C．-

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问题选择题

已知（x-2）²+|y+1|=0，则x+y的值是（　　）

A．1

B．-1

C．-3

D．3

答案

根据题意得：x-2=0且y+1=0

解得：x=2，y=-1

∴x+y=2-1=1

故选A．

听力题

根据句意和所给汉语，写出相应的单词。

1. Chinese President Hu Jintao called for world ________ (和平) , stability and prosperity in a New Year address broadcast on Wednesday

2. Sometimes I want to refuse to do so much work, but usually I just ________ (接受) it.

3. My penfriend hasn’t ________ (回复) to my last three emails.

4. This afternoon I’ll have my bicycle ________ (修理).

5. Dolly is the first ________ (克隆) sheep in the world.

6. I think your advice will be of great ________ (价值) to me, Mr Sigmund Friend.

7. This great actress is very popular in the world, especially among ________ (亚洲) fans.

8. A murder happened near the ________ (门口) of a sports shop in Moon Town.

填空题

某同学为了“探究液体内部的压强特点”，将一个六个面用橡皮膜组成的立方体，如图6（a）所示，浸没到盛有水的圆柱形深筒内，各个面的橡皮膜发生了形变，如图6（b）所示。

① 观察比较图6（a）和（b）中，各个表面的橡皮膜，可得的结论是___ (21)_ ___。

② 观察比较图6（b）中，上和下表面的橡皮膜，可得的结论是____ __(22)__ ____。