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 h 题目和参考答案——青夏教育精英家教网—

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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 50cm 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 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 time, follow these rules: ①Rest your wrists on something. ②Keep your elbows at the same height as the keyboard. ③Stop 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 the 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, wrists, hands and the upper part of your legs should all the parallel (平行) to the floor. If you are sitting for a long time, get up every 30 minutes and exercise your arms, legs and neck.
小题1:A computer screen may injure your eyes if __________.
A. you sit 60cm away
B. your eyes are too close to it
C. the window is on your left or right
小题2:Hand and wrist injuries are caused when you __________.
A. move in the same way again and again
B. rest your wrists on something
C. keep your elbows as high as the keyboard
小题3:When using a computer, your eyes and hands will be safe if you __________.
A. work near a window
B. work for a long time
C. take rests at times
小题4:It is good for your back and neck if you sit __________.
A. for many hours
B. in the right way
C. with the screen below your eyes
小题5:What would be the best title for the text?
A. How to Use a Computer Safely
B. How to Keep your Hands and Wrists Safe
C. How to Protect your Eyes and your Back

小题1:B
小题2:A
小题3:C
小题4:B
小题5:A

试题分析：本文介绍几种使用电脑时保护身体的方法。要离屏幕远一点，就能保护眼睛。经常动动手腕就能保护手腕。挺直后背就能减轻后背的伤害。
小题1:细节理解题。根据原文Too much light can injure your eyes, so never sit too close to a computer screen.可知如果离电脑屏幕太近，就会伤害眼睛。故选B。
小题2:细节理解题。根据原文Hand and wrist injuries can happen because the hands and wrists are moved in the same way hundreds of times.可知当你一次一次在同一个地方移动的时候，手和手腕就会受伤。故选A。
小题3:细节理解题。根据原文If you are sitting for a long time, get up every 30 minutes and exercise可知经常休息，经常锻炼，你的眼睛和手就会受到保护。故选C。
小题4:细节理解题。根据原文So you should sit with your back straight.可知要想保护后背，你应该坐直了。故选B。
小题5:细节理解题。根据原文Now learn to use a computer safely.可知本文介绍的是如何安全地使用电脑。故选A。

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