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 Computers can injure(伤害) 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.

【小题1】
A.fall overB.fall downC.fall offD.fall onto
【小题2】
A.carefullyB.luckilyC.slowlyD.quickly
【小题3】
A.fixB.runC.rideD.drive
【小题4】
A.Too manyB.Too muchC.Much tooD.Many more
【小题5】
A.soB.becauseC.butD.when
【小题6】
A.at lastB.at mostC.at leastD.less than
【小题7】
A.toB.fromC.onD.away
【小题8】
A.sometimeB.some timeC.some timesD.sometimes
【小题9】
A.canB.mayC.mustD.should
【小题10】
A.bothB.neverC.allD.none
【小题11】
A.hundred of B.hundredsC.hundreds ofD.two hundreds
【小题12】
A.follow B.workC.copy(复制)D.write
【小题13】
A.oneB.everyC.bothD.once
【小题14】
A.needB.exerciseC.moveD.climb
【小题15】
A.EnjoyB.UseC.Protect (保护)D.Keep


【小题1】C
【小题2】D
【小题3】C
【小题4】B
【小题5】A
【小题6】C
【小题7】B
【小题8】D
【小题9】D
【小题10】A
【小题11】C
【小题12】A
【小题13】B
【小题14】B
【小题15】A

解析试题分析:这篇短文告诉我们如何正确使用电脑;电脑对你的伤害是慢慢地;要注意从不离电脑屏幕太近,你的眼睛应该离屏幕至少50厘米;当你用电脑时,窗户应该在你的左边或右边;如果你长时间坐,每30分钟站起来并锻炼你的手臂等内容。
【小题1】考查动词短语及语境的理解。句意:如果你从自行车上跌落下来并折断胳膊。A. fall over跌倒,B. fall down 掉下,fall off从…….跌落。据句意,故选C。
【小题2】考查副词及语境的理解。句意:它发生的很快。A. carefully认真地,    B. luckily 幸运地,C. slowly   慢慢地,D. quickly很快地。据But computer injuries happen slowly.可知答案,故选D。
【小题3】考查动词及语境的理解。句意:你可能知道如何安全骑自行车。A. fix修理,B. run跑,C. ride骑,D. drive开车。据句意,故选C。
【小题4】考查固定短语及语境的理解。句意:太多的光会伤害到你的眼睛。light当“光”讲时,是不可数名词。too much太多, 修饰不可数名词。故选B。
【小题5】考查连词及语境的理解。句意:所以从不离电脑屏幕太近。A. so因此,B. because因为,   C. but但是,D. when当……的时候。据句意,故选A。
【小题6】考查固定短语及语境的理解。句意:你的眼睛应该离屏幕至少50厘米。A. at last 最后,B. at most至多,C. at least至少,D. less than小于。据句意,故选C。
【小题7】考查介词及语境的理解。句意:你的眼睛应该离屏幕至少50厘米。A. to向,B. from离……,C. on在……上,D. away离开。据句意,故选B。
【小题8】考查副词及语境的理解。句意:有时要记住离开屏幕看看。A. sometime某个时候,B. some time一些时间,C. some times几次,D. sometimes有时。据句意,故选D。
【小题9】考查情态动词及语境的理解。句意:当你用电脑时,窗户应该在你的左边或右边。A. can能, B. may可以,C. must必须,D. should应该,据句意,故选D。
【小题10】考查代词及语境的理解。句意:如果窗户在你的前面,太阳和屏幕将都照射进你的眼睛。both两者都,因为太阳和屏幕是两者,据句意,故选A。
【小题11】考查固定词组及语境的理解。句意:因为手和手腕以同一方式移动数百次。hundreds of 是固定词组,数以百计的。据句意,故选C。
【小题12】考查动词及语境的理解。句意:如果你长时间用键盘,遵守这三条规则。A. follow遵守,       B. work工作,C. copy复制,D. write写。据句意,故选A。
【小题13】考查形容词及语境的理解。句意:如果你坐很长时间,每30分钟站起来。A. one一,B. every 每,C. both都,D. once一次。据句意,故选B。
【小题14】考查动词及语境的理解。句意:如果你长时间坐,每30分钟站起来并锻炼你的手臂。A. need需要,B. exercise锻炼,C. move移动,D. climb爬。故选B。
【小题15】考查动词及语境的理解。句意:享受你的电脑,但要安全地使用它。A. Enjoy 享受,B. Use用,C. Protect   保护,D. Keep保持。据句意,故选A。
考点:科普类短文。

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