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问题 填空题
若点（a，b）是直线y=-2x-5与双曲线y=
3
2x
的交点，则
2a
b
+
b
2a
=______．
答案

若点（a，b）是直线y=-2x-5与双曲线y=

3
2x
的交点，

∴

-2a-5=b
3
2a
=b
，即：2a+b=-5，2ab=3，∴a与b同号且都是负数，

∴

2a
b
+
b
2a
=
-2a
-b
+
-b
-2a
=
-2a
2ab
+
-b
2ab

=

-(2a+b)
2ab
=
5
3
=
5
3
3
．

故答案为：

5
3
3
．

阅读理解

阅读理解。

     Do you have to carry a heavy bag to school? Does it make your back (背部) hurt? Well, students

at a high school in Kansas (堪萨斯州), America, have a meeting with their city's mayor to complain

(抱怨) about their heavy bags. They say their bags are giving them headaches, and making their necks

(脖子) and backs hurt. The mayor says he is very sorry. He says students may do more of their

homework on the Internet (国际互联网) to give their back a rest.

1. A heavy bag may make students    ____    .

A. headache      

B. earache      

C. toothache      

D. A, B and C

2. Kansas is in   ____    

A. China        

B. America      

C. Australia      

D. Canada

3. The students talk about their heavy bags to     ____   .

A. the mayor      

B. their parents    

C. their teachers    

D. their friends

4. "Mayor"in Chinese means    ____   .

A. 校长        

B. 队长          

C. 市长        

D. 省长

5. The mayor says    ____   .

A. he has a headache          

B. he wants the students to do more homework

C. he is sorry                

D. he has to work hard
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判断题

最常见的IT驱动的组织变革是自动化。
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