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
Ocean Noise Pollution Some scientists say that animals in the ocean are increasingly threatened by noise pollution caused by hu
Ocean Noise Pollution Some scientists say that animals in the ocean are increasingly threatened by noise pollution caused by hu
admin
2009-06-15
55
问题
Ocean Noise Pollution
Some scientists say that animals in the ocean are increasingly threatened by noise pollution caused by human beings.
The noise that affects sea creatures comes from a number of human activities. It is caused mainly by industrial underwater explosions, ocean drilling, and ship engines. Such noises are added to natural sounds. These sounds include the breaking of ice fields, underwater earthquakes, and sounds made by animals themselves.
Decibels (分贝) measured in water are different from those measured on land. A noise of one hundred-twenty decibels on land causes pain to human ears. in water, a decibel level of one-hundred ninety-five would have the same effect.
Some scientists have proposed setting a noise limit of one-hundred-twenty decibels in oceans. They have observed that noises at that level can frighten and confuse whales (鲸鱼).
A team of American and Canadian scientists discovered that louder noises can seriously injure some animals. The research team found that powerful underwater explosions were causing whales in the area to lose their hearing. This seriously affected the whales’ ability to exchange information and find their way. Some of the whales, even died. The explosions had caused their ears to bleed (出血)and become infected (感染).
Many researchers whose work depends on ocean sounds object to a limit of one-hundred-twenty decibels. They say such a limit is a greater danger than they believed. They want to prevent noises from harming creatures in the ocean.
选项
A、The sound of a car.
B、The sound of voices.
C、Man-made noise pollution.
D、The sound of steps.
答案
C
解析
转载请注明原文地址:https://kaotiyun.com/show/qzQd777K
本试题收录于:
职称英语理工类C级题库职称英语分类
0
职称英语理工类C级
职称英语
相关试题推荐
Manypeoplewronglybelievethatwhenpeoplereacholdage,-theirfamiliesplacetheminnursinghomes.Theyareleftinthe(51)
Atpresent,man’sefforts______.Thewritermayprobablybelievethat______.
Reliefworkerswereshockedbywhattheysaw.
StepBackinTimeDoyouknowthatwelivealotlongernowthanthepeoplewhowerebornbeforeus?Onehundredyearsagot
Accordingtothepassage,killinginsectsandbacteriapresentinfoodsbyirradiatingisnotcompletelyapprovedbytheUSgove
Theconferenceexploredthepossibilityofclosertradelinks.
WorldHeartDaySundaywasWorldHeartDay.TheWorldHeartFederationanditsmembergroupsinmorethanonehundredcountri
Shehasbeenthesubjectofmassivemediacoverage.
Organicfood:Why?1.Europeisnowthebiggestmarketfororganicfoodintheworld,expandingby25percentayearoverth
Awillisadocumentwrittentoensurethatthewishesofthedeceasedarerealized.
随机试题
下列哪些蛋白在应激急性期反应时少
在建设工程设计施工一体化/总承包合同中,对争议的处理,一般以()作为解决的最终方式。
甲乙两公司签订的购货合同约定,乙公司应当在8月30日向甲公司交付货物。8月初,乙公司通过铁路运输将货物发运到甲公司所在地车站,此时甲公司享有的权利有( )。
均质土坝土料压实的现场施工质量采用()控制。
甲乙二人共同盗得某珍贵文物。二人为了便于分赃同时也利于销赃,将文物砸碎私分。甲乙的行为构成盗窃罪与故意毁损文物罪。()
以下说法不正确的是()。
在CORBA体系结构中,负责屏蔽底层网络通信细节的协议是______。A.IDLB.RPCC.ORBD.GIOP
Thispartistotestyourabilitytodopracticalwriting.Youarerequiredtowriteabroadcastingannouncementaccordingtothe
Surfingisathrillinganddangerousactivityinwhichapersonbalancesonaboardandridesthesurfaceofabig,crashocean
A、Itissomethingthattheycancontrol.B、Theyknowthesituationwellenough.C、Theyarealwaysverypowerful.D、Theyhateto
最新回复
(
0
)