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

下列选项中属于集线器功能的是()。

A．增加局域网络的上传速度

B．增加局域网络的下载速度

C．连接各电脑线路间的媒介

D．以上皆是