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
31
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、Bad health.
B、Excessive noise.
C、Horns taken to football games.
D、The busy traffic.
答案
B
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3196377.html
相关试题推荐
WhywerethereprotestsinBritainagainstIran?[br][originaltext]TheBr
WhywerethereprotestsinBritainagainstIran?[originaltext]TheBritish
Whatdidtheprotestersdo?[br][originaltext]Hundredsofdemonstratorsw
WhathappenedtotheCubans?[originaltext]AmericanCoastGuardofficialsi
WhichisNOTtrueabouttheattack?[originaltext]Chechnya’smainrebelgro
WhatwillAirFrancedowithitsflightstoandfromLosAngeles?[originaltext
Whatarethetwostudentstalkingabout?[originaltext]W:Mmm.Thisisyummycof
Whatisthepassagemainlyabout?[br][originaltext]Severalhundredpeopl
Whatisthepassagemainlyabout?[originaltext]Severalhundredpeoplehave
Thespeakerisa______now.[br][originaltext]Iamreferringtocomputerl
随机试题
ItisknowntousthatEnglishisnotasoldasChinese,butitiswidelyus
Whileit’seasyenoughtobrushoffafewsleeplessnightswithapotofcof
n阶实对称矩阵A为正定矩阵,则下列不成立的是()。A.所有k级子式为正(k=
SMTP基于传输层的()协议,POP3基于传输层的()协议。A.TCP、TCP
A.Ⅰ期内痔 B.血栓性内痔 C.血栓性外痔 D.Ⅲ期内痔 E.混合痔排
血钾浓度低于()称为低钾血症;其原因有()
刘某,女,21岁。近日气候骤冷,调摄不慎,出现恶风畏寒,头痛时作,痛连项背,遇风
能促进肺心病发生心力衰竭的因素有 A.电解质紊乱所致的心律失常B.乳酸积累C.
肺癌患者血清中增髙的是 A.碱性磷酸酶 B.癌胚抗原 C.乳酸脱氢酶 D
2型糖尿病的特点是 A.都有“三多一少”表现 B.患者体型均较肥胖 C.患
最新回复
(
0
)