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
2024-02-01
40
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/3412652.html
相关试题推荐
[originaltext](16)Americansgetsomeoftheirnewsandentertainmentfrom
[originaltext]TraditionalAmericansummercampsofferyoungpeopleachance
[originaltext]TraditionalAmericansummercampsofferyoungpeopleachance
[originaltext]Readingisapermanenttopicforthosehighlycivilizedcount
[originaltext]Readingisapermanenttopicforthosehighlycivilizedcount
[originaltext]M:Howshouldwecelebratetheanniversaryofthefoundingofour
[originaltext]M:Howshouldwecelebratetheanniversaryofthefoundingofour
[originaltext]W:Hi!Ihaven’tseenyouthesedays.Howiseverythinggoing?M:
[originaltext]W:Hi!Ihaven’tseenyouthesedays.Howiseverythinggoing?M:
[originaltext]W:MissLeetelephoned.Sheaskedifyouwouldbeabletomeethe
随机试题
STOPSMOKINGDoyouwanttostopsmoking?Haveyoualreadytriedtostop
Inthe(11),theonlyknownway,toIndiafromEuropeinvolvedtraveling
【B1】[br]【B18】A、takeB、goC、putD、callA这里需要一个可与action搭配的动词,作定语从句中的谓语动词修饰action
建设项目财务评价与国民经济评价的区别主要有()。A.评价的角度不同
艾滋病的主要传播途径是A.飞沫传播B.粪-口传播C.血液传播D.虫媒传播E.直接
数据库设计的标准结构为三级模式、二级映射,该结构的主要作用是( )。A.提高数
某村民为盖房欲去山上砍伐几棵国有林木。其儿子说,未经许可去砍伐国有林木是违反森林
社会生态亚系统所具有的功能不包括()。A.人文资源 B.信息的共享、文化教
从所给四个选项中,选出最合适的一个填入问号处,使之呈现一定规律性: A.如上图
混凝土的()使混凝土的碱度降低,削弱混凝土对钢筋的保护作用,可能导致钢筋锈蚀。A
最新回复
(
0
)