首页
登录
职称英语
[originaltext] I’m glad to see so many of you here. We’ve become really alar
[originaltext] I’m glad to see so many of you here. We’ve become really alar
游客
2023-06-22
91
管理
问题
I’m glad to see so many of you here. We’ve become really alarmed over the health center by the number of students who are experiencing hearing loss. First, I want to go over some basics about hearing, and then we can take a look at our school environment and see if we can figure out some ways to protect hearing. The leading cause of preventable hearing loss is excessive noise. Too much moderate noise for a long time, or some types of intense noise for even a short time can damage hearing. Loudness is measured in units called decibels. One decibel is the lowest sound that the average person can hear. Sounds up to 80 decibels generally aren’t harmful, that’s like traffic on a busy street. But anything louder than 80 decibels, especially with continuous exposure, may eventually hurt your hearing. Once you’re up to around 140 decibels, that’s like a jet plane taking off, then you might even feel pain in your ears. And pains are sure sign that your hearing is at risk. Even one exposure to a really loud noise at close range can cause hearing loss. So what you need to do is limit your exposure to harmful levels. Now, take a look at the decibel level of some common campus sounds. Notice how loud those horns are that people take to football games. They are really dangerous if blown right behind you. Now, let’s try to generate a list of damaging noises.
16 What is the main cause of hearing loss?
17 What does the speaker say about harmful noise?
18 What does the speaker suggest to protect hearing?
19 What will the speaker probably do next?
选项
A、Exposure to excessive noise.
B、Lack of rest.
C、Unpreventable accident.
D、Intense work pressure.
答案
A
解析
录音提到引起可预防性失聪的主要原因(leading cause)是过度的噪音(excessive noise),A复现了录音原词,为正确答案。
转载请注明原文地址:https://tihaiku.com/zcyy/2773431.html
相关试题推荐
[originaltext](22)Sportshaveunwrittenrules,sodoesbusiness—andviolato
[originaltext](22)Sportshaveunwrittenrules,sodoesbusiness—andviolato
[originaltext]IhadspentmylastdayinLondonvisitingfriends,takingpic
[originaltext]Passionfruitistheediblefruitofthepassionflower.(16)Sp
[originaltext]Passionfruitistheediblefruitofthepassionflower.(16)Sp
[originaltext]M:EnglishLanguageCenter.HowmayIhelpyou?W:Yes.I’mcalli
[originaltext]M:EnglishLanguageCenter.HowmayIhelpyou?W:Yes.I’mcalli
[originaltext]W:Heytaxi!M:Whereto?W:Well,I’mgoingtotheNationalMuse
[originaltext]W:Heytaxi!M:Whereto?W:Well,I’mgoingtotheNationalMuse
[originaltext]Asinglecigarettesoldonastreetcornermaynotcostalot:
随机试题
Itisatimewornsignofoldageandfrailty.Yetarthritisoften【1】______t
Thisisaparticularmomentinthehistoryofdigitalnetworks,onewhenpow
WhyIntegrityMattersWhatisIn
[originaltext]W:Youdon’tlooktoowell.Maybeyoushouldtakethedayofffro
漏出液LD/血清LD的比值常A.<0.6 B.<0.5 C.<0.4 D.
组织持续学习文化的六大要素是()A.企业竞争气氛 B.上机支持 C.提供更
目前在全球范围内。巴塞尔委员会鼓励有条件的商业银行使用基于()来计算信用风险的监
设有超过100万元以后200万元的火险超赔分保,分保费固定为4.8万元,两次责任
某加工企业接受某学校委托,制作一批校服,总金额800万元,据此签订了加工承揽合同
某燃气项目招标人自行招标应具备的条件中不包括() A.招标人有项目法人资格
最新回复
(
0
)