题目列表(包括答案和解析)
在下列句中填入适当的单词，使句子完整.词首字母已给出.
Look! Your hands are so d . Please wash them.
在下列句中填入适当的单词，使句子完整.词首字母已给出.
Look! Your hands are so d . Please wash them.
阅读短文回答问题
According to the Center of Disease Control and Prevention(CDC)(疾病控制中心), if you don't often wash your hands, you can pick up viruses(病毒)from many places and make yourself ill．You're at risk every time you touch your eyes, nose or mouth．In fact, one of the most common ways people catch colds is by rubbing their noses or their eyes when there are cold viruses on their hands．If you don't often wash yours hands, specially when you're sick, you may spread the viruses directly to others．You should wash your hands in the following situations：
●After using the bathroom
●After blowing your nose or coughing
●Before eating, serving or preparing food
●After touching pets or other animals
●After visiting anyone who is sick
●When your hands are dirty
There is a right way to wash your hands．Follow these simple steps to keep your hands clean．
●Use warm water(not cold or hot)
●Wash for 15 seconds
●Rinse(冲洗)well under warm water and dry them with a clean towel．
Information Card
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.
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
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 a rest 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 title for the passage?
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
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