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    精英家教网 > 初中英语 > 题目详情
    阅读理解。
         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 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 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
         Hand and wrist injuries can happen because the hands and wrists are moved in the same way hundr-eds of
    times. If you use a keyboard for a long time, follow these three rules: 1) Rest your wrists on some-thing. 2)
    Keep your elbows (肘) 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 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 be 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.
         Enjoy your computer, but use it safely.
    1. A computer screen may injure your eyes if _____.
    A. you sit 60 centimeters away
    B. you remember to look away
    C. your eyes are too close to it
    D. the window is on your left or right
    2. Hand and wrist injuries are caused when you _____.
    A. get plenty of exercise
    B. move in the same way again and again
    C. rest your wrists on something
    D. keep your elbows as high as the keyboard
    3. Your eyes and hands will be safe if _____.
    A. you work near a window
    B. you often take rests from working
    C. you use a keyboard for a long time
    D. the window is behind you
    4. It is good for your back and neck if you sit _____.
    A. in the right way
    B. for many hours
    C. with the screen below your eyes
    D. with your back leaning forward
    5. What would be the best tide for the text? 
    A. How to protect your eyes
    B. How to protect your hands and wrists
    C. How to use a computer safely
    D. How to protect your back
    1-5 CBBAC
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