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 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 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 (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 (肘部） at the same height as the keyboard. 3) Stop something 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 all be in front of your eyes. Your forearms（前臂）, wrists, hands and the upper（上部） 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 necks.
　Enjoy your computer, but use it safely.
【小題1】A computer screen may injure your eyes if __________.

A．you sit 60 centimeters awayB．you remember to look away
C．your eyes are too close to it　　D．the window is on your left or your right
【小題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
【小題3】Your eyes and hands will be safe if __________.
A．you work near a window　　B．you often take a rest from working
C．you use a keyboard for a long timeD．the window is behind you
【小題4】It is good for your back and neck if you sit __________.
A．in the right wayB．for many hours
C．with the screen below your eyesD．with your back leaning forward
【小題5】 What would be the best title for the passage?
A．How to protect your eyesB．How to protect your hands and wrists
C．How to use a computer safelyD．How to protect your back

 
【小題1】C
【小題2】B
【小題3】B
【小題4】A
【小題5】C  

解析【小題1】細節(jié)理解題，根據(jù)文中語句“Too much light can injure your eyes, so never sit too close to a computer screen.”理解可知。
【小題2】細節(jié)理解題，根據(jù)文中語句“Hand and wrist injuries can happen because the hands and wrists are moved in the same way hundreds of times.”理解可知。
【小題3】細節(jié)理解題，根據(jù)文中語句理解可知。
【小題4】細節(jié)理解題，根據(jù)文中語句理解可知。
【小題5】標題理解歸納題，根據(jù)文中語句理解歸納可知。

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