Computers can injure you. Most other injuries happen suddenly. For example, if you fall of

Computers can injure you. Most other injuries happen suddenly. For example, if you fall off a bike and break your arms, it happens very quickly. But computer injuries happen slowly.
You probably know how to ride a bike safely. Now learn to use a computer safely.
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 (厘米) 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 window is in front of you, the sun and the screen will both shine into your eyes.
Your hands--Hand injuries can happen because the hands are moved in the same way hundreds of times. If you use a keyboard for a long time, follow this rule: Stop sometimes and exercise your hands and fingers in different ways.
Your back--Some people sit for many hours in front of a computer. If you sit in the wrong way, you can injure your back and your neck. So you should sit with your back straight. The top part of the screen should be in front of your eyes. 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.
【小题1】How many kinds of computer injuries are mentioned in this passage?A．One.B．TwoC．Three.D．Four.【小题2】A computer screen may injure your eyes if .A．you sit 60 centimeters awayB．you remember to look awayC．your eyes are too close to itD．the window is on your left or right【小题3】Your eyes and hands will be safe if .A．you work near a windowB．you often take rests from workingC．you use a keyboard for a long timeD．the window is behind you【小题4】Which sentence is NOT true according to this passage?A．You should sit with your back straight while you work on a computer.B．Staying in front of a computer too long may injure your eyes.C．When you work on a computer, your hands almost move in the same way.D．The writer thinks that computer is bad for your health.【小题5】What would be the best title for the text?A．How to protect your eyesB．How to protect your handsC．How to use a computer safelyD．How to protect your backC

(答案→)C 解析：本文指出电脑可以伤害你。大多数其他的伤病是突然发生的，但是电脑伤害的发生是缓慢的。并且告诉人们使用电脑时如何保护自己的一些方法【小题1】C细节理解题。根据第三段提到Your eyes--Too much light can injure your eyes, so never sit too close to a computer screen还有第五段Your hands--Hand injuries can happen because the hands are moved in the same way hundreds of times还有第六段提到Your back--Some people sit for many hours in front of a computer.电脑会伤害你的眼，手还背部，故选C项。【小题2】C细节理解题，根据文中语句“Too much light can injure your eyes, so never sit too close to a computer screen.”理解可知强光会伤害你的眼睛，不要做得太近离屏幕，故选C项。【小题3】B细节理解题。根据短文描述Remember to look away from it sometimes. This gives your eyes a rest.,可知工作中时常的休息,对眼睛和手来说是安全的,故选B【小题4】D 细节理解题。根据最后一段提到Enjoy your computer, but use it safely.享受你的电脑，但要正确的运用，可知并不是说电脑对你的健康有坏处，而是讲合理应用，故选D项。【小题5】C主旨大意。这篇短文主要描述了使用电脑过程中的一些安全问题,故选C,如何安全的使用电脑。

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