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

 

I lost my sight when I was four years old by falling off a box and landing on my head. Now I am thirty-two. I can vaguely(模糊地) 　1　 the brightness of sunshine and what color red is. It would be wonderful to see things again, 　2　 a disaster can do strange things to people. It happened to me the other day that I might not have come to love 　3　 as I do if I hadn’t been blind. I believe in life now. I am not sure that I would believe in it so 　4　. I don’t mean that I would prefer to go without my eyes. I 　5　 mean that the loss of 　6　 made me enjoy more of 　7　 I have now.

Life asks us to keep making 　8　 to reality. If a person is able to get ready for anything changeable his world will 　9　 more meaningful. I became blind, but I was 　10　. My parents and my teachers saw 　11　 in me－a potential(潜力) to live, you might call it－which I didn’t see, and they make me fight it out with blindness.

The hardest 　12　 I had to learn was to believe in myself. That was what I had to do at least. If I hadn’t been able to do that, I would become a chair rocker for the 　13　 of my life. When I say I believe in myself I am not talking about simply the kind of self-confidence that helps me down an unfamiliar staircase 　14　. That is part of it. But I mean something bigger than that: A belief that I could deal with anything alone; that somewhere in the 　15　 there is a special place where I can make myself fit.

1. A. imagine       B. find             C. remember     D. guess

2. A. but           B. though               C. so           D. because

3. A. myself        B. life             C. eyes         D. blindness

4. A. that          B. therefore            C. happily      D. deeply

5. A. seldom        B. just             C. hardly           D. always

6. A. them      B. it                   C. blindness        D. light

7. A. that          B. what             C. which            D. where

8. A. moments       B. encouragements       C. improvements D. changes

9. A. become        B. change               C. look         D. end

10. A. brave        B. lucky                C. sad          D. wise

11. A. something    B. everything           C. nothing      D. anything

12. A. problem      B. experience           C. difficulty       D. lesson

13. A. rest     B. whole                C. need         D. last

14. A. lonely       B. alone                C. self         D. person

15. A. company  B. group                C. society  (社会)   D. family

 

I lost my sight when I was four years old by falling off a box and landing on my head. Now I am thirty-two. I can vaguely(模糊地) 　1　 the brightness of sunshine and what color red is. It would be wonderful to see things again, 　2　 a disaster can do strange things to people. It happened to me the other day that I might not have come to love 　3　 as I do if I hadn’t been blind. I believe in life now. I am not sure that I would believe in it so 　4　. I don’t mean that I would prefer to go without my eyes. I 　5　 mean that the loss of 　6　 made me enjoy more of 　7　 I have now.

Life asks us to keep making 　8　 to reality. If a person is able to get ready for anything changeable his world will 　9　 more meaningful. I became blind, but I was 　10　. My parents and my teachers saw 　11　 in me－a potential(潜力) to live, you might call it－which I didn’t see, and they make me fight it out with blindness.

The hardest 　12　 I had to learn was to believe in myself. That was what I had to do at least. If I hadn’t been able to do that, I would become a chair rocker for the 　13　 of my life. When I say I believe in myself I am not talking about simply the kind of self-confidence that helps me down an unfamiliar staircase 　14　. That is part of it. But I mean something bigger than that: A belief that I could deal with anything alone; that somewhere in the 　15　 there is a special place where I can make myself fit.

1. A. imagine       B. find             C. remember     D. guess

2. A. but           B. though               C. so           D. because

3. A. myself        B. life             C. eyes         D. blindness

4. A. that          B. therefore            C. happily      D. deeply

5. A. seldom        B. just             C. hardly           D. always

6. A. them      B. it                   C. blindness        D. light

7. A. that          B. what             C. which            D. where

8. A. moments       B. encouragements       C. improvements D. changes

9. A. become        B. change               C. look         D. end

10. A. brave        B. lucky                C. sad          D. wise

11. A. something    B. everything           C. nothing      D. anything

12. A. problem      B. experience           C. difficulty       D. lesson

13. A. rest     B. whole                C. need         D. last

14. A. lonely       B. alone                C. self         D. person

15. A. company  B. group                C. society  (社会)   D. family