Question

    Sales of laptop computers passed desktops in the U. S. for the first time ever this fall,according to market-research firm ID C. That's bad news for backs,necks and shoulders.

     Laptops are bad for our body. When you work at a computer,the keyboard should be at elbow height and the monitor should be roughly at eye level? so you can sit well in a chair.      But most users simply set their laptops on a desk or table. The keyboard is too high> which makes your arms reach up? your shoulders feel tired and your wrists bend down. The monitor is too low,which pulls your head and neck forward and down and your back may feel hurt.

    That s OK if you use your laptop for a short time. But if you use one for hours without stopping—— as do millions of college students? business travelers? telecommuters) video-gamers and growing numbers of office workers —your body may feel hurt. Ergonomics experts have warned about laptop problems for years. But people still like laptops better than the desktops. And they use laptops anywhere—— in bed,on the floor-in all kinds of positions.

    “How can a mouse or a keyboard hurt you?” says Thomas Caffrey,the founder of Myofactors  LL C. Wrong positions can be bad for your body. As time goes by,a wrong position can lead to pain in the neck,shoulders,back and arms,as well as headaches. ”

() 1. When you work at a computer,the keyboard should be.

   A. at elbow height   B. at eye height   C. on a desk   D. on a table

() 2. The writer asks us not to use the laptop.

   A. for a short time   B. to play video games

   C. for hours without stopping   D. to buy things on the Internet

() 3. From the passage,we know that laptop computers.

   A. are not so popular as the desktops   B. are more popular than the desktops

   C. are not bad for our body   D. have no mouse now

() 4. Using a laptop in a wrong position may make.

   A. people s  sight lower   B. people have cancer

   C. people s  arm longer   D. people feel pain in the body

() 5. According to the passage,which of the following is NOT true?

   A. When you use a laptop,you should put your monitor at eye height.

   B. Laptop computers sold more than desktops this autumn.

   C. To keep healthy,you should use laptop computers.

   D. Business travelers often use the laptop computers for a long time.

Answer 1

1. A 2. C 3. B 4. D 5. C

[解析]本文介绍笔记本电脑使用时的注意事项。

使用不当，容易对身体产生不良影响。

1. A 根据文中语句 When you work at a computer,the keyboard should be at elbow height and the monitor should be roughly at eye level,so you can sit well in a chair.可知用电脑时，键盘和胳膊肘应 该是一般高，故选A.

2. C 根据文中语句 That's OK if you use your lap-fop for a short time. But if you use one for hours without stopping—as do millions of college students,business travelers,telecommuters,video—gamers and growing numbers of office work- ers一your body may feel hurt.理解可知。用手提 电脑短时间是可以的，但长时间会对人体有害，故 选C.

3. B 根据 Ergonomics experts have warned about laptop problems for years. But people still like laptops better than the desktops. 可知手提电脑比台 式电脑流行的多，故选B.

4. D 根据 Wrong positions can be bad for your body. As time goes by,a wrong position can lead to pain in the neck,shoulders,back and arms,as well as headaches.可知，错误的姿势可能给身体 带来伤害。

5. C根据文中语句理解可知。常用手提电脑对身 体非常有害，故选C.