Computers can injure you. Most other injuries happen suddenly. For example, if you fall off a bicycle and break your arm, it happens very quickly. But computer injuries happen slowly.

Your eyes

Too much light can injure your eyes, so never sit too close to a computer screen. Your eyes should be at least 50 centimeters from the screen. Remember to look away from it sometimes. This gives your eyes a rest.

When you use a computer, the window should be on your left or your right. If it is behind you, the light will reflect(反射) on the screen. If the windows is in front of you, the sun and the screen will both shine into your eyes.

Your hands and wrists(手腕)

Hand and wrist injuries can happen because the hands and wrists are moved in the same way hundreds of times. If you use a keyboard for a long times, follow these three rules: 1) Rest your wrists on something. 2) Keep your elbows at the same height as the keyboard. 3) Stop sometimes and exercise your hands, wrists and fingers in a different way.

Your back

Some people sit for many hours in front of a computer. If you sit in a wrong way, you can injure your back or your neck. So you should sit with your back straight. The top part of the screen should be in front of your eyes. Your forearms(前臂), wrists and hands should all be parallel to(與......平衡) the floor. If you are sitting for a long time, get up every 30 minutes and exercise your arms, legs and neck.

Enjoy your computer, but use it safely.

1.The underlined word “injure” means “ .”

A. 保護 B. 影響 C. 傷害 D. 幫助

2.Your eyes should .

A. be close to the screen B. be less than 50 centimeters from the screen

C. face the window D. be more than 50 centimeters from the screen

3.To protect your hands and wrists you should .

A. Keep your elbows above the height of the keyboard

B. Keep your wrists hanging without touching anything

C. Keep your elbows below the height of the keyboard

D. Stop playing computer sometimes and exercise

4.Which of the following is true?

A. Sitting wrongly is only bad for your wrists and fingers.

B. Your eyes should be at the same height as the top part of the screen.

C. You should have a rest every two hours.

D. You should sit in front of a screen and play computer for a long time.

5.Which is the best title of this passage?

A. How to Use a computer Safely. B. How to Play Computer Games.

C. How to Protect Your Eyes. D. Computers Are very Harmful.

1.C 2.D 3.D 4.B 5.A 【解析】文章大意：這篇短文主要介紹了電腦傷害不是突然發(fā)生的而是慢慢形成的，所以我們要學會安全地使用電腦。文章介紹了電腦對眼睛、手及手腕、背部的傷害以及具體防護辦法。 1.細節(jié)理解題。根據(jù)下文But computer injuries happen slowly.但是電腦的傷害是慢慢發(fā)生的，可知這里是說：電腦可以“傷害”你，...
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