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
Nobody can be really free from the sound. Whether we live in the middle of a modern city or a faraway village, we are surrounded
Nobody can be really free from the sound. Whether we live in the middle of a modern city or a faraway village, we are surrounded
admin
2011-02-08
47
问题
Nobody can be really free from the sound. Whether we live in the middle of a modern city or a faraway village, we are surrounded by sound every day such as the sounds from television and radio, household appliances, and traffic. Sound makes up a part of our life.
In fact, most of us can not bear total silence. Sound gives us a sense of safety and brings us joy. Scientific tests have also proved that total silence is a very frightening experience for human beings. A recent report shows that people feel quite lonely without background sound while they are working. The background sound which doesn’t change too much may even help people to concentrate.
However, sometimes, sound is not helpful and joyful in people’s life. Normally, we hear these sounds at safe levels that do not affect our hearing. However, when we are exposed to harmful noise—the sounds that are too loud or loud sounds that last a long time, sensitive structures in our inner ear can be damaged, causing hearing loss.
Besides, unpleasant sounds, particularly sudden and uneven ones, may cause fear and anger. Noise is a source of stress, which can lead to tiredness, irritability and headaches. Noise can also raise blood pressure, putting strain on the heart. People living in homes exposed to high levels of road-traffic noise were more likely to report having hypertension, according to a study in Environmental Health. The researchers estimate the noise levels for the addresses of more than 24, 000 Swedish. They found that people exposed to an average traffic-noise level above 64 decibels (slightly louder than a normal conversation) were 52% more likely than people exposed to 45 decibels of road noise to report having high blood pressure, a key risk factor for heart disease, after removing age, socioeconomic status, and other variables. Noise exposure could cause hypertension by persistently elevating the body’s level of stress hormones.
Now we know that noise is harmful to our health, but can we get used to the excessive noise? The answer is NO. If, after long exposure to excessive noise, we stop hearing it — because we have become deaf!
The author writes this passage to
选项
A、tell us the knowledge of sound.
B、compare sound with noise.
C、show the hazard of noise.
D、warn the noise damage.
答案
D
解析
纵观全文,文中首先说明声音对人们生活的积极作用,然后重点讲述了噪音给人们带来的危害,并在最后一段强调虽然声音息息相关,但我们不得不预防噪音给我们身体造成的危害,因此作者此文的目的是警示人们小心噪音伤害。选择D项。
转载请注明原文地址:https://kaotiyun.com/show/l2xd777K
本试题收录于:
公共英语四级笔试题库公共英语(PETS)分类
0
公共英语四级笔试
公共英语(PETS)
相关试题推荐
Somepeoplewerejustborntorebel;CharlesDarwinwasoneofthem.【21】______NicholasCopernicus,BenjaminFranklinandBillGa
ThreedevelopmentsintheUnitedStateshighereducationstartedmorethanacenturyagofollowingthe______.
Aneweraisuponus.Callitwhatyouwill:theserviceeconomy,theinformationage,theknowledgesociety.Italltranslates
Duringtheearlyperiodoftheearth’shistory,theweatheronearthapparentlyfluctuatedbetweenbrightsunandshowers.Inr
TheOrganizationforEconomicCo-operationandDevelopment(OECD)conservativelyestimatesthat,by2005,worldwideelectronic
Whenitcomestogenderrolesinfamilies,itseemsthemorethingschange,themoretheystaythesame.Forthefirsttime,the
PeoplelivingonpartofthesouthcoastofEnglandfaceaseriousproblem.In1993,theownersofalargehotelandofseveral
Whycan’tthelibraryissuelibrarycardstoeveryonewhoapplies?
Inthe1960stheWestCoastbecameanimportantcenterforrockmusic.LosAngelesandSouthernCaliforniaarefamousforsunshi
随机试题
剩余价值产生的唯一源泉是()。
A.少商B.尺泽C.涌泉D.阴谷E.曲泉足厥阴肝经的合穴是
消化道溃疡经治疗后粪便颜色已趋正常,但隐血试验阳性仍可持续几天
关于病毒性心肌炎患儿的休息,以下正确的是()
可降低糖尿病风险的因素有
A.白僵蚕B.地龙C.刺蒺藜D.石决明E.代赭石能平肝疏肝,祛风明目的药物是
不是郁证初起的临床特点的是
A.补肾固精,养肝明目B.温肾补精,养血益气C.益肾补肺,止血化痰D.补肾阳,祛风湿E.暖肾固精缩尿,温脾止泻摄唾沙苑子的功效是
某法兰盘生产企业采用单对象流水线的生产组织方式。法兰盘的日生产量为50件,每日工作8小时,时间有效利用系数为0.90,假设废品率为0;流水线的第3道工序计算所需某精密设备为6台,现有5台该种设备投入生产。根据以上资料,回答下列问题:为了解决流水线节拍
Afteryuppiesanddinkies,anewcreaturefromadlandstalkstheblock.TheNYLON,anacronymlinkingNewYorkandLondon,isa
最新回复
(
0
)