Question

Computers can injure(傷害) you. Most other injuries happen suddenly. For example, if you a bike and break your arms, it happens very . But computer injuries slowly.You probably know how to ride a bike safely. Now learn to a computer safely.

Your eyes

light can injure your eyes, never sit too close to a computer screen. Your eyes should be 50 centimeters（厘米） the screen（平幕）， Remember to look away from it sometimes. This gives your eyes a rest.

When you use a computer, the window 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 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 times. If you use a keyboard for a long time, these three rules: 1) Rest your wrists on something. 2) Keep your elbows 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, 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 30 minutes and your arms, legs and necks.

your computer, but use it safely.

1.A. fall overB. fall downC. fall offD. fall onto

2.A. carefullyB. luckilyC. slowlyD. quickly

3.A. fixB. runC. rideD. drive

4.A. Too manyB. Too muchC. Much too D. Many more

5.A. so B. becauseC. but D. when

6.A. at last B. at mostC. at leastD. less than

7.A. toB. fromC. on D. away

8.A. sometimeB. some timeC. some timesD. sometimes

9.A. canB. mayC. must D. should

10.A. bothB. neverC. allD. none

11.A. hundred ofB. hundredsC. hundreds ofD. two hundreds

12.A. follow B. work C. copy(復(fù)制)D. write

13.A. oneB. everyC. both D. once

14.A. needB. exerciseC. moveD. climb

15.A. Enjoy B. Use C. Protect(保護)D. Keep

 

Answer 1

1.C

2.D

3.C

4.B

5.A

6.C

7.B

8.D

9.D

10.A

11.C

12.A

13.B

14.B

15.A

【解析】

試題分析：這篇短文告訴我們?nèi)绾握�確使用電腦；電腦對你的傷害是慢慢地；要注意從不離電腦屏幕太近，你的眼睛應(yīng)該離屏幕至少50厘米；當(dāng)你用電腦時，窗戶應(yīng)該在你的左邊或右邊；如果你長時間坐，每30分鐘站起來并鍛煉你的手臂等內(nèi)容。

1.

2.

3.

4.

5.

6.50厘米。A. at last最后，B. at most至多，C. at least至少，D. less than小于。據(jù)句意，故選C。

7.50厘米。A. to向，B. from離……，C. on在……上，D. away離開。據(jù)句意，故選B。

8.

9.

10.

11.

12.

13.

14.

15.

考點：科普類短文。