网址：http://m.1010jiajiao.com/timu3_id_2388850[举报]
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缺词填空
Is it difficult for you to get up in the morning? Are you often l________ for work or school? Yes? Then a scientist called Mike has a s________ bed for you．His bed will get you up in the morning！ Here is how it w________．
The bed is connected to an alarm clock．F________, the alarm clock rings．You have a few minutes to wake up．Next, a tape recorder in the bed p________ soft music and then your girlfriend's beautiful voice came, “Wake up, darling, please．” A few minutes later, loud music came from the tape recorder．At the same t________, you may hear the voice of your boss．Your boss shouts angrily, “Wake up at once, or you'll be late！” If you don't get up a________ that, you'll be sorry！ A plastic “foot” is in the bed．It kicks you in the head．Then the bed waits a few more minutes．What！ You're s________ in bed！ Slowly the top of the bed rises higher and the foot of the bed goes l________
Finally, you fall off the bed and onto the floor．You are out of bed and awake！
Mike made his bed because he wanted to take part in a competition．Mike w________ one of the top prizes(奖)for his bed．
1．l________
2．s________
3．w________
4．F________
5．p________
6．t________
7．a________
8．s________
9．l________
10．w________
--How did the accident happen?
--He ________ the tall tree.
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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 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.
【小题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 your right |
| 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 |
| A．you work near a window | B．you often take a rest from working |
| C．you use a keyboard for a long time | D．the window is behind you |
| A．in the right way | B．for many hours |
| C．with the screen below your eyes | D．with your back leaning forward |
| 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 |