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
78
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
Pollutionisa"dirty"word.Topollutemeanstocontaminate—topsoilorsomethingbyintroducingimpuritieswhichmake【C1】______
Pollutionisa"dirty"word.Topollutemeanstocontaminate—topsoilorsomethingbyintroducingimpuritieswhichmake【C1】______
Pollutionisa"dirty"word.Topollutemeanstocontaminate—topsoilorsomethingbyintroducingimpuritieswhichmake【C1】______
Pollutionisa"dirty"word.Topollutemeanstocontaminate—topsoilorsomethingbyintroducingimpuritieswhichmake【C1】______
Pollutionisa"dirty"word.Topollutemeanstocontaminate—topsoilorsomethingbyintroducingimpuritieswhichmake【C1】______
Wehaveknowntheelephants,thegreatestlandmammalofthemall—highlysensitive,intelligent,family-oriented,big-toothedcr
FromthepassageweknowthattheGlobeisafamous______.Thewriterwantedtoresignbecause______.
随机试题
9个月女童因面色苍黄、食差就诊。混合喂养,8个月添加辅食。查体:面色苍黄,黏膜略显苍白。心肺未见异常。红细胞3.8×1012/L,血红蛋白98g/L。正确的诊断应为
痫病与厥证的共同点是
昏迷的主要并发症为
安神兼祛痰开窍安神兼活血散瘀
运用物价指数法估测设备重置成本需注意很多问题,下列说法正确的是()。
我国监管当局规定,商业银行可以开展信托投资业务。()
小规模纳税人购入原材料,其中,货款100万元,增值税额16万元,在购入材料的过程中另支付运杂费1万元。则该企业原材料的入账价值为()万元。
“青少年、儿童是社会未来,人类的希望,有着独立的社会地位,是行使权利的主体。”这是()。
A、 B、 C、 C本题图片是穿戴用品。句子较长,但由其中的(inthe)trousers(长裤)及后面的anewpair即可知要选[C]。其余两项都不用pair修饰。
Sincemovingpictureswereinventedacenturyago,anewwayofdistributingentertainmenttoconsumershasemergedaboutoncee
最新回复
(
0
)