首页
登录
职称英语
What is this passage talking about? [br] [originaltext] We’ve become reall
What is this passage talking about? [br] [originaltext] We’ve become reall
游客
2023-11-17
85
管理
问题
What is this passage talking about? [br]
We’ve become really alarmed over the health center by the number of students we are seeing, who are experiencing hearing loss. First, I want to go over some basics about hearing. 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 8O decibels generally aren’t harmful. That’s noise like traffic on a busy street. But any- thing louder than 80 decibels may eventually hurt your hearing. Once sounds are up to around 140 decibels, that’s like a jet plane taking off, then you might feel pain in your ears. And pains are sure sign that your hearing’s 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. If you pass along this handout, we can 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.
选项
A、Traffic on a busy street.
B、Jet plane taking off.
C、Sound that the average person can hear.
D、Sounds up to 80 decibels.
答案
B
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3196376.html
相关试题推荐
Fromthepassageweknowthatpiglets______.[br][originaltext]Pigletsmay
Fromthepassageweknowthatpiglets______.[br][originaltext]Pigletsmay
Accordingtothewoman,whatgovernstheclotheswewear?[br][originaltext]M:
Accordingtothewoman,whatgovernstheclotheswewear?[originaltext]M:Doyo
Whatisthepurposeofthemeeting?[br][originaltext]W:Well,we’reheretod
Whatisthepurposeofthemeeting?[br][originaltext]W:Well,we’reheretod
Japan’sdemandforimportslastmonth[br][originaltext](26)Japan’strade
Japan’sdemandforimportslastmonth[br][originaltext](26)Japan’strade
Untilwhattimewillthetornadowatchbeineffect?[br][originaltext]We
WhatchangeshappenedattheAcademyAwards?[br][originaltext]Thisyear,
随机试题
WhenIwasinmyearlyteens,Iwastakentoaspectacularshowonicebyth
TheTroodosareaofCyprusisonlyanhour’sdrivefromthecoast,sowhynot
UnforgettableOlympicMomentsSinceFrenchbaronPierred
Manydoctorsknowthestoryof’MrWright’.In1957hewasdiagnosedwithc
[originaltext](I):Um-hum.Nowyoumentionedsomethingaboutmaximizingyourle
主办券商、会计师事务所、律师事务所、其他证券服务机构及其相关人员在全国股转系统从
PubMed上的题目和文摘属于A.一级文献B.二级文献C.三级文献D.数据库文献
全球最著名的基准利率有伦敦同业拆借利率和上海银行间同业拆借利率。( )
将全面预算分为投资预算、营业预算和财务预算,其分类依据是()。A.涉及的内
最新回复
(
0
)