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9.Loud noises in everyday activities can damage the inner ear.This type of hearing loss can't be healed.But it can be prevented.Block the noise from entering your ears; walk away from it; and turn it down.Those are your first steps in staying safe.
On average,15% of all school-age children live with some hearing loss.And it's a growing problem.A study published in the Journal of the American Medical Association in 2012found a 31% rise from 2003to 2010in hearing loss among kids ages 12to 19.
A 2013study by Harvard Medical School did not find the same significant increase.But the Harvard study found that teenage girls have more hearing problems than teenage boys.The study did not track kids into adulthood.
"Imagine a handful of pipe cleaners (烟斗通条).They represent the hair cells (毛细胞) in your ear,"Andrea Boidman of Research Foundation said."Being exposed to a really loud noise is like shaking the pipe cleaners really fast.When you're done,the pipe cleaners are all bent.You can never really make them straight again,"she says."That's like what happens with your hair cells.Once they are damaged,they never go back to being perfect again,and eventually the damage will start to affect your hearing."
Most people don't know that listening to headphones at full volume puts your ears at risk,"If your iPod is on the maximum volume(最大音量),it's too loud,"says Boidman."If you listen to it at that level every day,it will cause hearing loss."Sometimes,staying safe and sound is as simple as turning it down.
21We can conclude from the study by Harvard Medical School thatC.
A.the increase of hearing loss among kids reached 31%
B.more teenage boys suffer hearing loss than teenage girls
C.teenage girls experience more hearing loss than teenage boys
D.the number of adults with hearing problems increased greatly
22.Why does the author compare the pipe cleaners to the hair cells?D
A.Both can be strongly shaken    
B.Neither could be seen clearly
C.Both should be protected carefully   
D.Neither can recover fully if damaged
23.According to the text,when listening to an iPod one shouldB.
A.avoid using headphones     
B.set the proper volume level
C.take a walk while listening     
D.check the safety rules for the headphones
24.The text is mainly aboutD.
A.teenagers'bad habit      
B.a research on teenage safety
C.listening ability and hearing loss   
D.everyday activities and hearing loss.

分析 本文主要讲述青少年的日常活动及听力的降低.

解答 21-24 CDBD
21   C  细节题. 根据文章第 二段But the Harvard study found that teenage girls have more hearing problems than teenage boys. 可知哈佛大学研究发现在听力问题方面女生比男生严重,故选C.
22  D  细节题. 根据文章倒数第 二段 Once they are damaged,they never go back to being perfect again,可知一旦他们被毁坏,他们将不能恢复到完美的境地,故选D.
23  B  细节题. 根据文章最后一段 Sometimes,staying safe and sound is as simple as turning it down.可知听iPod时应该将声音调低,有利于你的听力,故选B.
24  D  主旨大意题.  通读全文可知本文主要讲述青少年的日常活动及听力的降低.故选D.

点评 做阅读理解时要快速的浏览全文,把握文章主旨大意,带着问题回到原文,寻找细节或概括相应的答案,最后要理清作者写作思路.

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C.twins raised in two separate families are different in personality
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B.it is harder to follow the effects of parental upbringing
C.immigrant children avoid speaking the same way as their parents at school
D.it is proved that peers have a greater effect on children's qualities
35.What does the author mean by saying parents are not completely off the look at the end of the passage?D
A.Parents should control the situation.
B.Parents should give their way to children.
C.Parents should spend more time on children.
D.Parents should take on their responsibility.

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