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]本文介紹筆記本電腦使用時的注意事項。

使用不當，容易對身體產生不良影響。

1. A 根據文中語句 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.可知用電腦時，鍵盤和胳膊肘應 該是一般高，故選A.

2. C 根據文中語句 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 電腦短時間是可以的，但長時間會對人體有害，故 選C.

3. B 根據 Ergonomics experts have warned about laptop problems for years. But people still like laptops better than the desktops. 可知手提電腦比臺 式電腦流行的多，故選B.

4. D 根據 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，錯誤的姿勢可能給身體 帶來傷害。

5. C根據文中語句理解可知。常用手提電腦對身 體非常有害，故選C.