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
2023-06-30
50
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/2796386.html
相关试题推荐
[originaltext]Culturecanandshouldplayaroleinbringingpeopletogethe
[originaltext]Culturecanandshouldplayaroleinbringingpeopletogethe
[originaltext]Culturecanandshouldplayaroleinbringingpeopletogethe
[originaltext]Iamnotonlyapainter,butastudentofart.Sometimes,[20]
[originaltext]Alllanguagesareequalfromalinguisticpointofview.Iti
[originaltext]M:[9]TheRepublicanPartyinAmericaisopposingstemcellresear
[originaltext]M:I’msorryI’mlate,Rose.W:That’sallright,Vic.Myhousei
[originaltext]M:I’msorryI’mlate,Rose.W:That’sallright,Vic.Myhousei
[originaltext]M:I’msorryI’mlate,Rose.W:That’sallright,Vic.Myhousei
[originaltext]W:Excuseme,wherecanIfindtheseriesHairyPotter?Ihavebe
随机试题
Checkinginformation核实信息CanIjustchecksomethinghere,Derek?Ihaveaque
Thewordconservationhasathriftymeaning.Toconserveistosaveandprote
Nosooner______steppedoutofthehallthanitbegantorain.A、hadwe.B、havew
[originaltext]EverydayakeeperatPragueZooleadshalfadozenbabyflamingo
左侧舌下神经损伤可导致( )A.不能伸舌 B.伸舌时舌尖偏向左侧
血管扩张药中适用于前负荷加重为主,肺淤血明显者的药物是( )。A.硝酸甘油
一般来说,如果交易者资金规模较小,则对应的期货合约的交易单位就可以设计得大一些。
劳务输出:是指生产力水平底,生活条件较差的国家和地区,为了积累资金,开拓视野,吸
2015年1-10月,上海原煤产量约为( )万吨。A.1340 B.12
下列不属于行政诉讼受案范围的是:()A.张某不服A区行政机关对其民事纠纷作出的
最新回复
(
0
)