首页
财务会计
医药卫生
金融经济
考公考编
外语考试
学历提升
职称考试
建筑工程
IT考试
其他
登录
职称考试
Music is one of the most beautiful forms of artistic expressions ever invente...
Music is one of the most beautiful forms of artistic expressions ever invente...
admin
2020-12-24
43
问题
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.
Our eardrums can withstand sound within 20 to 80 decibels(分贝).Once sound exceeds this limit, even beautiful music will become ear-splitting noise and harm health. A strong blast(响声)of high sound can twist and break a solid iron sheet. High sound of 150 decibels can kill a healthy rat.
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 20,000Hz is called ultrasonic(超音波的).Dolphins, whales and bats can make such high-frequency sound. It does no harm to health.
Sound less than 20Hz is called irrfrasonic(次声)waves. When we move, the air will vibrate. The vibration of air can produce infrasonic waves. As the frequency of infrasonic waves is close to that of people’s internal organs, infrasonic wave may cause resonance(共振)in human bodies. As a result,people’s vision may weaken and internal organs may rupture(断裂).However, whether an infrasonic wave can be used as a weapon depends on its intensity. If its intensity is very low, it wonJt damage internal organs or a persons health. If the intensity of infrasonic wave exceeds 160 decibels, it is extremely harmful. When wind blows at a force of 3 or 4 over the sea, 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.
It is true that the sound
选项
A of nature is the most beautiful.
B of high intensity benefits animals.
C in movies is pleasing to the ear.
D over 80 decibels is harmful to people.
答案
D
解析
第二段明确提到了 “Once sound exceeds this limit, even beautiful music will become ear-splitting noise and harm health”,故此题选 D。
转载请注明原文地址:https://ti.zuoweng.com/ti/Bp9QKKKQ
相关试题推荐
Wehaveneverseensuchgorgeoushills.A.beautifulB.stretchingC.spreadingD
Humanfacialexpressionsdifferfromthoseofanimalsinthedegreetowhich...
Wehaveneverseensuchgorgeoushills.(2007)()A.beautifulB.stretchingC.sprea
Thatuniformmakestheguardslookabsurd.A:seriousB:ridiculousC:beautiful
Wehaveneverseensuchgorgeoushills.AbeautifulBstretchingCspreadingDro
Thetwogirlslookalike.A:similar B:beautifulC:pretty D:attractive
Wehaveneverseensuchgorgeoushills.AbeautifulBstretchingCspreadingDro
Maineisjustlyfamousforitsbeautifullakesandponds.A:onlyB:rightfullyC:l
Thetwogirlslookalike.A:beautiful B:similar C:pretty D:attractive
Wehaveneverseensuchgorgeoushills.A:beautiful B:stretching C:spreading D
随机试题
(60-61题共用备选答案) A.风温 B.春温 C.暑温 D.大头瘟
下面关于B细胞功能检测方法的描述错误的是 A.经典溶血空斑形成试验所测到的细胞
以下不是PTSD临床表现的是
国家重力控制测量不包括()
影响能力形成和发展的因素有() A.遗传学校教育C.家庭教育D.环境
班主任以教育目的为指导思想.以“学生守则”为基本依据,对学生一个学期内在学习、劳动、生活、品行等方面进行小结与评价。这项工作是()。A.建立学生档案B.班
符合t检验条件的数值变量如果采用了秩和检验。则( )A.第一类错误增大B.第二类错误增大C.两类错误同时增大D.两类错误减小E.以上均不对
在清热剂中,以红花为主的方剂是A.君方B.臣方C.佐方D.使方E.民方
下列关于乙型肝炎病毒“大三阳”的表述,正确的是A.提示乙肝病毒在体内复制活跃,具有传染性,需要隔离B.不具有传染性C.如果肝功能正常,可定期监测,不需要抗病
关于资金成本性质的说法,正确的是()。A.资金成本是指资金所有者的利息收人B.资金成本是指资金使用人的筹资费用和利息费用C.资金成本一般只表现为时间的函数