首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
The Magic of Sound Music is one of the most beautiful forms of artistic expressions ever invented. In movies and plays, music ha
The Magic of Sound Music is one of the most beautiful forms of artistic expressions ever invented. In movies and plays, music ha
admin
2009-06-15
88
问题
The Magic of Sound
Music is one of the most beautiful forms of artistic expressions ever invented. In movies and plays, music has an added function: it not only moves people but also can shock people. Is it true that an ordinary musical instrument can be so powerful?
Our eardrums can withstand sound within 20 to 80 decibels. Once sound exceeds this limit, even beautiful music will become ear-splitting noise and harm health. A strong blast of high sound can twist and break a solid iron sheet.(46)
The noise from a plane’s engine is over 140 decibels. However, the sound of a flute is at most a few decibels.(47)It has been proven that people who have worked in an environment with a high sound intensity for a long time suffer varying degrees of heart disease or altered brain waves.
In movies, sometimes the hero can produce a sound that ordinary people can’t hear and only those who have the same ability can feel. In nature, there is actually sound that is beyond our hearing. In physics, the sound that exceeds 20,000 Hz is called ultrasonic.(48)It does no harm to health.
Sound less than 20 Hz is called infrasonic waves. When we move, the air will vibrate.(49)As the frequency of infrasonic waves is close to that of people’s internal organs, infrasonic wave may cause resonance in human bodies. As a result, people’s vision may weaken and internal organs may rupture. However, whether an infrasonic wave can be used as a weapon depends on its intensity. If its intensity is very low, it won’t damage internal organs or a person’s health.(50)When wind blows at a force of 3 or 4 over the sea6, it will produce infrasonic waves of several decibels. Only typhoons can produce infrasonic waves of over 100 decibels. At present, scientists can only produce infrasonic weapons in the lab with the help of advanced scientific tools and powerful electric power.
A. High sound of 150 decibels can kill a healthy rat.
B. The vibration of air can produce infrasonic waves.
C. We cannot play high-pitched music with ordinary musical instruments.
D. If the intensity of infrasonic wave exceeds 160 decibels, it is extremely harmful.
E. Dolphins, whales and bats can make such high-frequency sound.
F. Therefore, the sound of ordinary musical instruments cannot harm your health.
选项
答案
D
解析
“空5”前面的句子说:如果次声波的强度低,不会伤害人的内部器官或影响人的健康。与上述意思有联系的句子出现在选项D。选项D说:如果次声波的强度超过160分贝,就极为有害。两个句子连在一起,构成一个完整的论述。所以,D是答案。
转载请注明原文地址:https://kaotiyun.com/show/lWhd777K
本试题收录于:
职称英语理工类基础题库职称英语分类
0
职称英语理工类基础
职称英语
相关试题推荐
Theresultsofthenewstudyareunexpected.Fungusandmoldsinlocalfoodsmaybepartlyresponsibleforthehighcancerrate
Theresultsofthenewstudyareunexpected.TherateofcancerofstomachandesophagusinLinxianisthehighestinChina.
Accordingtothepassage,someengineersaretryingtoimprovethehandlebarsbecauseInwhichofthefollowingwaysthehandgr
Healthworkersthemselvesareawareoftheimportanceofcontinuedtraining.Thephrase"healthcare"meansmorethancurative
Itiseasytodeterminewhethersmokingishazardous.Thereisevidencethatsmokingisresponsibleforbreastcancer.
HowmanypeoplediedfromheatinChicagoin1995?Forpeoplewhoareinextremelypoorhealth,heatcanbe
ParentsintheUnitedStatestendtoasktheirchildrenWhichofthefollowingisNOTtrueofworkingclassAmericans?
A.becauseoftheirsimilarityB.thatwewouldnotbeabletounderstanditatallC.tothepopularizationofEnglishasawor
AnObservationandanExplanationItisworthlookingatoneortwoaspectsofthewayamotherbehavestowardsherbaby.
TheMysteriesofNazcaInthedesertofPeru,300kilometersfromLima,oneofthemostunusualartworksintheworldhasmys
随机试题
“青青子衿,悠悠我心”出自《诗经.郑风.子衿》,曹操在《短歌行(其一)》中引用,借以表达的心情是()
邓小平指出,推动社会主义社会发展的动力是()
目前最常用的制作种植体的材料是.
施工总承包的特点有( )。
国债是一种特殊的()范畴。
某二级公路工程实行公开招标,招标项目估算价为7000万元人民币。资金由项目所在地省交通运输厅筹集,招标人为该省公路建设投资集团公司。投标报价方式为工程量清单报价,工程数量由招标人给出,由投标人填写单价和总价。在招投标和施工过程中,发生了如下事件:
社区工作的社会策划模式注重自上而下的改变,其特征包括()。
设x,y∈R,a>1,b>1,若ax=by=3,a+b=2的最大值为()。
Questions34-39Completetheflow-chartbelow.ChooseNOMORETHANTWOWORDSAND/ORANUMBERfromthepassageforeachanswer.W
Ascientifictheoryisapublicpronouncementthatindicateswhatascientistbelievestobetrueabouthisorherspecificare
最新回复
(
0
)