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
2024-01-30
32
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、Measure damaging noises on campus.
B、Make a list of campus noises.
C、Figure out how to fight against noise.
D、Explain the concept of noise.
答案
B
解析
在录音的最后,说话者提到“让我们列出一个有害噪音的清单吧”,且结合之前提到的校园噪音可知,此处是指列出校园内的噪音清单,故B为答案。
转载请注明原文地址:https://tihaiku.com/zcyy/3407606.html
相关试题推荐
[originaltext]Sinceaunionrepresentativevisitedourcompanytoinformus
[originaltext]Sinceaunionrepresentativevisitedourcompanytoinformus
[originaltext]Whenpeoplecareforanelderlyrelative,theyoftendonotu
[originaltext]Whenpeoplecareforanelderlyrelative,theyoftendonotu
[originaltext](16)Therearemanycommonlyheldbeliefsabouteyeglassesan
[originaltext](23)AnewbookbytwoprofessorsatPennsylvaniaStateUniver
[originaltext]Fromthebeginningofhumanhistory,(21)peoplehaveusedoil
[originaltext]Asmoreandmorepeoplelosetheirjobs,nowisperhapstheti
[originaltext]Asmoreandmorepeoplelosetheirjobs,nowisperhapstheti
[originaltext]Asmoreandmorepeoplelosetheirjobs,nowisperhapstheti
随机试题
Sixyearsago,aMiamiwomanwalkingthroughthehallofanofficebuilding
迫降功能启动后,对于消防电梯,井道和机房照明自动点亮,消防电梯脱离同一组群中的所
固定式配电箱、开关箱中心点与地面的相对高度应为()。A.0.5m B.1.0
论业务流程建模方法及应用 业务流程建模是系统分析阶段一项非常重要的工作,是业务
脱落细胞常用的染色法为()。A.巴氏染色 B.H-E染色 C.瑞氏-吉
“四君子”等寒窗清供之物是传统文人常用的花鸟画题材,而( )的画作已不限于此,
根据《企业劳动争议处理条例》,起诉前必经的程序是()A.协商 B.调解
在()的情况下,可能会采用降职这一方式。A.希望能培养员工多个方面的能力
以下不属于产业组织创新的直接效应的是()。 A.专业化分析与协作B.促
某施工企业在进行施工成本控制时,为了及时了解实施项目的成本情况,需要将计划成本与
最新回复
(
0
)