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
If you live in a large city, you are quite familiar with some of the problems of noise, but, because of some of its harmful eff
If you live in a large city, you are quite familiar with some of the problems of noise, but, because of some of its harmful eff
admin
2011-02-28
81
问题
If you live in a large city, you are quite familiar with some of the problems of noise, but, because of some of its harmful effects, you may not be aware of the extent of its influence on human behavior. Although everyone more or less knows what noise is, i. e., it is sounds that one would rather not hear, it is perhaps best to define it more precisely for scientific purposes. One such definition is that noise is sounds that are unrelated to the task at band. Thus stimuli (刺激物)that at one time might be considered relevant will at another time to be considered noise, depending on what one is doing at the moment. In recent years there has been a great deal of interest in the effects on human behavior, and concepts such as "noise pollution" have arisen, together with movements to reduce noise.
Exposure to loud noises can definitely produce a partial or complete loss of hearing, depending on the intensity, duration, and frequency composition of the noise. Many jobs present noise hazards (危险), such as working in factories and around jet aircraft, driving farm tractors, and working in music halls where rock bands are playing. In general, continuous exposure to sounds of over 80 decibels can be considered dangerous. Decibel values correspond to various sounds. Sounds above 85 decibels may, if exposure is for a sufficient period of time, produce significant hearing loss. Noise can have unexpected harmful effects on performance of certain kinds of tasks, for instance, if one is performing a watch keeping task that requires vigilance (注意), in which he is responsible for detecting weak signals of some kind (e. g. , watching a radar screen for the appearance of aircraft).
Communicating with other people is unfavorably affected by noise. If you have ridden in the rear of a jet transport, you have noticed that it was difficult to carry on a conversation at first, and that, eventually you adjusted the loudness of your speech to compensate for the effect. The problem is noise.
Noise differs from sound in that ______.
选项
A、noise interferes with the task being done
B、noise is a special type of loud sound
C、noise is usually unavoidable in big cities
D、noise can be defined more precisely than sound
答案
A
解析
文章的第四行:That noise is sounds that are unrelated to the task at hand.
转载请注明原文地址:https://kaotiyun.com/show/iMtd777K
本试题收录于:
公共英语三级笔试题库公共英语(PETS)分类
0
公共英语三级笔试
公共英语(PETS)
相关试题推荐
【T1】Inafamilywheretherolesofmenandwomenarenotsharplyseparatedandwheremanyhouseholdtasksaresharedtoagreate
【T1】Inafamilywheretherolesofmenandwomenarenotsharplyseparatedandwheremanyhouseholdtasksaresharedtoagreate
Pollutionisa"dirty"word.Topollutemeanstocontaminate—topsoilorsomethingbyintroducingimpuritieswhichmake【C1】______
Pollutionisa"dirty"word.Topollutemeanstocontaminate—topsoilorsomethingbyintroducingimpuritieswhichmake【C1】______
Pollutionisa"dirty"word.Topollutemeanstocontaminate—topsoilorsomethingbyintroducingimpuritieswhichmake【C1】______
Pollutionisa"dirty"word.Topollutemeanstocontaminate—topsoilorsomethingbyintroducingimpuritieswhichmake【C1】______
ItwasthedayIfrozeahouseholdpetthatIbegantoworryaboutmymemory.Technically,itwasnotarealhouseholdpetIfro
Accordingtothepassage,whatdoestheunderlinedphrase"livedabit"mean?Theinterpretersrelyonadrenalinebecause_____
Accordingtothewriter,timeproblems______.
ItwasthedayIfrozeahouseholdpetthatIbegantoworryaboutmymemory.Technically,itwasnotarealhouseholdpetIfro
随机试题
下列哪篇作品是陶渊明带自叙传性质的散文【】
对社会组织的培育和支持最直接的手段是()
维持人体体温,属于气的哪项功能
不属于非感染性发热的是
统计资料可以分为()。
甲市人民政府决定,一项地方规章由于客观情况发生重大变化而失效,下列与此相关的说法中,正确的有()。
下列关于公告与通告的区别表述错误的是()。
骑士队夺冠后举行了盛大的花车游行。花车上有M、N、O、P四个人,他们分别扮演一位超级英雄。已知:①“超人”靠在N后面。②演“钢铁侠”的人在O的前面某个位置。③在2号位置的人扮演“闪电侠”。④O穿成“蝙蝠侠”的样子。
用二维表结构表示实体以及实体间联系的数据模型称为【】数据模型。
HowtoConquerPublicSpeakingFearⅠ.IntroductionA.Publicspeaking—acommonsourceofstressforeveryoneB.Thetr
最新回复
(
0
)