首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
What is this passage talking about?
What is this passage talking about?
admin
2014-05-14
12
问题
What is this passage talking about?
(14)We’ve become 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. Then we can take a look at our school environment and see if we can figure out some ways to protect hearing. (16) 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 by decibels. One decibel is the lowest sound 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 may hurt your hearing. (15) Once you are up to 140 decibels, that’s like a jet plane taking off, then you might even feel pain in your ears. Those 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.
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://kaotiyun.com/show/8aUK777K
0
专业英语四级
相关试题推荐
Astheplanecircledovertheairport,everyonesensedthatsomethingwaswrong.Theplanewasmovingunsteadilythroughtheair
Withunemploymenttidethroughouttherichworld,moreandmoreyoungpeopleareseekinginternships.Manyfirms,nervousabout
Facebook—withitsrequirementthatusers(1)_____atleast13—andTwitterareindeedgearedtowardolderteenagersandadults.P
NewYear’sresolutionsarethosespeciallittlepromisesyou(1)_____tobelesslikeyourselfandmorelikeother,betterpeople
Lawyersarelessthan1%ofAmericanadults,(1)_____theyarewell-representedingovernment.Boththepresidentandthevice-p
Whatisthenewsmainlyabout?
Whatisthispassagemainlyabout?
Whichofthefollowingisthemostpossibleplacewheretheconversationtakesplace?
Icaughta______ofthecarbeforeitdisappearedaroundthecornerofthestreet.
Shestumbledand________thecoffee.
随机试题
4只小猴吃桃,第1只猴吃的是其他猴吃的1/3,第2只猴吃的是其他猴吃的1/4,第3只猴吃的是其他猴吃的1/5,第4只猴将剩下的46个桃全吃了,则4只猴子共吃了()桃。
某日13时10分,罗某驾驶一辆中型客车从高速公路0公里处出发,下午14时10分行至该高速公路125公里加200米处时,发生追尾碰撞,机动车驶出西南侧路外边坡,造成11人死亡、2人受伤。罗某的主要违法行为是什么?
以滋阴养血、补心安神为主要功效,最宜选用的方剂是
女婴,出生6天,其母换尿片时发现其阴道流出少量血性分泌物而向护士咨询。护士正确的解释是
装修公司甲在完成一项工程后,将剩余的木地板、厨卫用具等卖给了物业管理公司乙。但甲营业执照上的核准经营范围并无销售木地板、厨卫用具等业务。甲、乙的买卖行为法律效力如何?
根据《德国民法典》规定,下列说法中正确的是()。
根据《旅行社条例》规定,旅行社委派的导游人员和领队人员未持有国家规定的导游证或者领队证的,由旅游行政管理部门责令改正,对旅行社处()的罚:款。
下列关于壮族的描述,正确的有()。
辨认
WhatmakesAmericansspendnearlyhalftheirfooddollarsonmealsawayfromhome?TheanswerslieinthewayAmericanslivetod
最新回复
(
0
)