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    Computers can injure(伤害)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 more than 50 centimeters from the screen. Don’t forget 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 on(反射)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 three rules: 1) Rest your wrists on something.
    2) Keep your elbows(肘)as high 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 the wrong way, you can injure your back or your neck. So you shouldn’t bend your back when you sit. 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 be parallel(平行)to the floor. If you are sitting for a long time, get up every half an hour and exercise your arms, legs and neck．
    Enjoy your computer, but use it safely．
                     Title:  How to use a computer safely
    Different
    小题1: of your body
    		Causes of the injuries
    		Some 小题2: of keeping you away from computer injuries
     
    Your eyes
    		◆Too much light can injure your eyes
    		◆Don’t sit too close to a computer screen．
    ◆Your eyes should be  小题3:         50 centimeters from the screen．
    ◆ 小题4: to look away from the screen sometimes．
     
    Your    小题5:    and wrists
    		◆You  小题6:  them in the same way hundreds of times.
    ◆You use a keyboard for a long time.
    		◆小题7: your wrists on something.
    ◆Keep your elbows at the same       小题8: as the keyboard．
    ◆Exercise your hands, wrists and fingers in different ways．
     
    Your back
    		◆You sit for many hours   小题9:  a computer．
    ◆ You sit in the wrong way.
    		◆You should keep your back             小题10:when you sit．
    ◆Get up every half an hour if you are sitting for a long time.

    小题1:parts
    小题2:ways
    小题3:over
    小题4:Remember
    小题5:hands
    小题6:move
    小题7:Rest 
    小题8:height
    小题9:before
    小题10:straight 

    试题分析：这篇短文主要介绍了大部分的伤害是突然的，但是电脑对人体的伤害是缓慢的。作者就如何安全的使用电脑给出了一些建议。
    小题1:根据短文描述可知电脑对人的身体的许多部位有伤害及表格归纳，故填parts
    小题2:根据表格下方的内容可知是远离电脑伤害的方法，故填ways
    小题3:根据短文Your eyes should be more than 50 centimeters from the screen.可知眼睛要远离屏幕50厘米以上，故填over
    小题4:根据Don’t forget to look away from it sometimes. 可知记得要时而不看电脑，故填Remember
    小题5:根据短文描述可知电脑对你的手和肘会有伤害，故填hands
    小题6:根据Hand and wrist injuries can happen because the hands and wrists are moved in the same way hundreds of times描述，可知你用相同的方式移动数百次。故填 move
    小题7:根据短文Rest your wrists on something.描述，故填 Rest 
    小题8:根据Keep your elbows(肘)as high as the keyboard. 描述，故填height
    小题9:根据Some people sit for many hours in front of a computer.描述可知有一些人在电脑前坐好几个小时，故填before
    小题10:根据So you shouldn’t bend your back when you sit 可知你不应该在坐着时弯曲背部，即要保持背部是直的，故填straight 
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    		You can get小题1:       your body needs from different food.
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