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 modem city or a faraway village, we are surrounded
Nobody can be really free from the sound. Whether we live in the middle of a modem city or a faraway village, we are surrounded
admin
2012-01-19
28
问题
Nobody can be really free from the sound. Whether we live in the middle of a modem 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相关,但我们不得小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/nVxd777K
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
Whatisthemostfundamentaldifferencebetweenplantsandanimals?
Whatisthemostfundamentaldifferencebetweenplantsandanimals?
Man’spuzzlementandpreoccupationwithtimebothderiveultimatelyfromhisuniquerelationshiptoit.Allanimalsexistin
RealpolicemenhardlyrecognizeanyresemblancebetweentheirlivesandwhattheyseeonTV.Thefirstdifferenceisthata
Thequestionofwhetherwarisinevitableisone,whichhasconcernedmanyoftheworld’sgreatwriters.Beforeconsideringthis
Thequestionofwhetherwarisinevitableisone,whichhasconcernedmanyoftheworld’sgreatwriters.Beforeconsideringthis
Themorewomenandminoritiesmaketheirwayintotheranksofmanagement,themoretheyseemtowanttotalkaboutthingsforme
Whenitcomestogenderrolesinfamilies,itseemsthemorethingschange,themoretheystaythesame.Forthefirsttime,the
Whenitcomestogenderrolesinfamilies,itseemsthemorethingschange,themoretheystaythesame.Forthefirsttime,the
随机试题
直肠痛最常见的远处转移是()
60钴放射源的平均寿命为
患者女,41岁。无意间发现左乳外上象限大小为1.0cm×1.5cm质中包块,无疼痛及周围皮温增高现象。患者既往有乳腺增生病史5年。行左乳癌改良根治术及腋窝淋巴结清扫术,病理检查结果提示为左乳浸润性导管癌,13枚腋窝淋巴结中4枚阳性,ER++,PR++,He
A.子宫阜B.宫颈枕C.伪子宫体D.宫颈阴道部E.子宫角间(背侧和腹侧)韧带牛子宫不具有
( )是纳税人税务登记内容发生重要变化向税务机关申报办理的税务登记手续。
L签证是发给来中国旅游、探亲;访学或处理其他私人事务入境的人员。()
按照皮亚杰的认知理论,儿童开始逐渐从别人的观点去看问题,看到别人解决问题的不同,并能够接受别人的意见,修正自己的看法,这一阶段被称为()。
每一个博弈中的企业通常都拥有不止一个竞争策略,其所有策略的集合构成了该企业的策略集。在企业各自的策略集中,如果存在一个无论竞争对手采取什么策略,自己均可最大获益的策略,则称其为占优策略,与之相对的其他策略则为劣势策略。现有两家公司甲和乙在考虑是否通过广告进
A、 B、 C、 D、 A
某单位的技术人员在不影响本职工作的条件下,在其他单位兼职并利用所兼职单位的物质技术条件研制出一项发明创造,对该发明创造申请专利的权利属于(15)。
最新回复
(
0
)