首页
登录
职称英语
[originaltext] I am glad to see so many of you here. We’ve become really ala
[originaltext] I am glad to see so many of you here. We’ve become really ala
游客
2024-02-27
28
管理
问题
I am glad to see so many of you here. We’ve become really alarmed over at the health center by the number of students we are seeing, who are experiencing heating 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 heating 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 noise like traffic on a busy street. But anything louder than 80 decibels, esp. 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. If you pass along this hand-out, 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 fight behind you. Now, let’ s try to generate a list of damaging noises.
选项
A、Information on sources of infection.
B、Suggestions on how to treat heating loss.
C、A chart of sounds and decibel levels.
D、A list of doctors who test hearing.
答案
C
解析
理解推理题。文中提到If you pass along this hand-out,we can take a look at the decibel level of some common campus sounds而这些信息在手册中有可能以图表形式出现。
转载请注明原文地址:https://tihaiku.com/zcyy/3487846.html
相关试题推荐
[originaltext]Interviewer:What’sthenameofyourcompany?Interviewee:TheAt
[originaltext]Interviewer:What’sthenameofyourcompany?Interviewee:TheAt
[originaltext]M:Ineedtousemorethanjustmymathskillsforthesequestion
[originaltext]M:Ineedtousemorethanjustmymathskillsforthesequestion
[originaltext]M:Ineedtousemorethanjustmymathskillsforthesequestion
[originaltext]M:Ineedtousemorethanjustmymathskillsforthesequestion
[originaltext]M:Ineedtousemorethanjustmymathskillsforthesequestion
[originaltext]M:Ineedtousemorethanjustmymathskillsforthesequestion
[originaltext]M:Vicky!Haveyouheardthenews?W:No,Sam.Whatdoyoumean?
[originaltext]M:Vicky!Haveyouheardthenews?W:No,Sam.Whatdoyoumean?
随机试题
Theoldgentlemanwasavery______lookingperson,withgrayhairandgoldspecta
WhichofthefollowingisatragedywrittenbyShakespeare?A、Hamlet.B、Dr.Faust
Thestudyofanimalsinparksandinthewildhasgivenadeeperknowledgeo
[originaltext]AlbertSchweitzerwasbornin1875inAlsace.Atthattime,i
女,28岁,午后低热1周伴干咳、左胸痛,活动后气急2天。胸透提示左侧胸腔积液,血
项目计划成本的编制依据是()。A.投标价 B.合同价 C.预算
关于有控制组的事前事后对比实验,下列说法正确的是()。A.事前对实验组正常情
关键风险指标监测的()原则是指监控工作要能够反映操作风险全局状况及变化趋势,揭
细辛除祛风散寒外,又能A.燥湿止带 B.利水消肿 C.温肺化饮 D.消肿排
专营化妆品销售的雅兰公司取得某外商产品的独家经销权后发现,该外商把部分产品批发给
最新回复
(
0
)