Michael became interested in headphones in his early teens．He walked the streets day after day with loud music playing directly into his ears．By his early 20s.Michael had lost much of his upper-leve 题目和参考答案——青夏教育精英家教网—

精英家教网 > 高中英语 > 题目详情

13．Michael became interested in headphones （耳机） in his early teens．He walked the streets day after day with loud music playing directly into his ears．By his early 20s，Michael had lost much of his upper-level hearing．
The Children's Hearing Institute reports that hearing loss among children and young adults is rising in the United States，and that one-third of the damage is caused by noise．
Noise-caused hearing loss can come about in two ways：from a brief exposure （暴露） to a very loud noise or from long exposure to medium noise．Thus，there is much concern about the lasting effects of MP3players that are turned up loud enough to block out surrounding sound．An MP3player at maximum volume （音量） produces about 105decibels （分贝）-100times as intense （强烈的） as 85decibels，where hearing damage begins．（For every 10decibels，sound intensity increases ten times．）
The National Institute for Occupational Safety and Health says 110decibels can produce hearing damage after just 1minute and 29seconds of exposure．Noise levels above 85decibels will harm hearing over time．
Special kinds of headphones may not solve the problem．Users may turn up the volume to overcome surrounding noises，damaging the tiny hair cells in the inner ear that send sound energy to the brain．
Once damaged，hair cells can neither be repaired nor replaced．The damage makes it difficult to hear high-pitched （声调高的） sounds，including certain speech sounds and the voices of women and children．Tinnitus （耳鸣），that is，ringing in the ear，can also result．
The League for the Hard of Hearing advises children to take part in more quiet activities，like watching family-centered films，playing educational computer games，drawing and painting，and visiting libraries and museums．
41．The function of the first paragraph is toC．
A．introduce the character of the passage
B．tell the purpose for writing the article
C．introduce the topic of the article
D．tell the main idea of the passage
42．We can learn from Paragraphs3-4thatA．
A．sound intensity will increase 1，000times if decibels increase from 85to 115
B．noise levels lower than 105decibels won't harm your hearing
C．MP3players that produce 90decibels may do no harm to one's hearing
D.110decibels will produce hearing damage in 1minute
43．Which of the following statements about"hair cells"is TRUE？B
A．They can be fixed if they are damaged．
B．Damage to them may lead to ringing in the ear．
C．They can be replaced with advanced equipment if destroyed．
D．One can't hear any sound if they are damaged．
44．We can learn from the passage thatD．
A．most children's hearing damage in USA is caused by noise
B．hearing loss can happen with brief exposure to medium noise
C．turning up MP3players prevents ears from being damaged by noise
D．it is better to visit a library than to go to a pop concert
45．The passage mainly tells usB．
A．how the hair cells are damaged
B．noises have a bad effect on children's hearing
C．what to do to protect children's hearing
D．the importance of hair cells to one's hearing．

分析本文是科教类说明文．通过介绍Michael十几岁对耳机感兴趣，到二十几岁导致听力受损而引出"听力受损"这个话题．然后介绍了产生听力受损的两个方面，听力受损的后果及如何避免听力受损的一些建议．

解答 CABDB
41．答案：C 细节理解题．通过介绍Michael十几岁对耳机感兴趣，经常大音量戴着耳机，到二十几岁是便丧失了大部分听力这个例子来引出"听力受损"这个话题．故选C．
42．答案：A 细节理解题．从第三段An MP3player at maximum volume produces about 105decibels-100times as intense as 85decibels，where hearing damage begins．（For every 10decibels，sound intensity increases ten times．）可知，音量达到85分贝时，听力受损开始，105分贝时的强度是85分贝强度的100倍，在105分贝基础上每增加10分贝，强度增加10倍，而115分贝时，即是100的10倍，便是1000倍．故选A．
43．答案：B 细节理解题．从Once damaged，hair cells can neither be repaired nor replaced可知，排除A项和C项；从The damage makes it difficult to hear high-pitched sounds，including certain speech sounds and the voices of women and children可知，排除D项；从Tinnitus，that is，ringing in the ear，can also result．可知，B项正确．故选B．
44．答案：D 推理判断题．孩子过多地暴露于噪音高的场所会导致加力受损，最后一段The League for the Hard of Hearing advises children to take part in more quiet activities，like watching family-centered films，playing educational computer games，drawing and painting，and visiting libraries and museums可知，图书馆是安静的场所，而流行音乐会则是噪音大的场所．故选D．
45．答案：B 主旨大意题．本文主要介绍孩子听力受损是由过多地暴露于噪音环境造成的．故选B．

点评高考中选用的科技文往往反映的是当今人类最先进的科技水平和最新的科研成果．我们阅读它的过程其实就是学习科学知识，掌握科技信息的过程．然后，理解文章，分析文章，以阅读材料所提供的科学事实为依据，同时得出的结论还应符合基本的科普常识，选择最合适的答案．

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