首页
登录
职称英语
After going over some basic about hearing, the teacher will lead the students to
After going over some basic about hearing, the teacher will lead the students to
游客
2023-11-10
27
管理
问题
After going over some basic about hearing, the teacher will lead the students to [br]
I’m glad to see so many of you here. We’ve become really alarmed over the health center by the number of students we are seeing, who are experiencing hearing loss. (7) First, I want to go over some basic about hearing. Then we can take a look at our school environment and see if we can figure out some ways to protect hearing. (8) 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 here. (9) Sounds up to 80 decibels generally aren’t harmful. That’s noise like traffic on a busy street. But anything louder than 80 decibels, especially with continuous exposure, may eventually hurt your hearing. (10) Once you are 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’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、suffer from hearing loss.
B、feel pain in your ears.
C、feel normal.
D、faint.
答案
B
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3173509.html
相关试题推荐
Studentsareexpectedtobequietand______inanAsianclassroom.A、obedientB、
Thestudentsexpectedthere_____morereviewingclassesbeforethefinalexams.A、
As______clearfromhismanners,heisateacher.A、beingB、isC、tobeD、beenB关系分
Ibecameateacherunderbizarrecircumstances,butinretrospectitwasone
Ibecameateacherunderbizarrecircumstances,butinretrospectitwasone
Highschoolandcollegestudentstodayarepushedsomuchinthedirectionofsp
Recentsurveysshowthatalotofcollegestudentsdownloadpapersfromthe
Themorningclass______over,studentsrushedoutoftheclassroomforlunch.A、wa
Mostofus,asstudents,arecarefulwithourmoneyindailylife:wecollec
Aftergoingoversomebasicabouthearing,theteacherwillleadthestudentsto
随机试题
TheeasternbluebirdisconsideredthemostattractivebirdnativeofNorthAmer
有一位银行家被他的决心和乐观精神所打动,最终答应贷款给他,供其开业。Impressedbyhisdeterminationandoptimism,
LadiesandGentlemen,WelcometoLondonInternationalLanguageCenter.Wete
Awell-documentedbodyofinformationexists.Itshowsthatnoisecan【C1】___
系统原理是指任何一个系统内的管理手段必须构成一个连续封闭的回路,才能形成有效的管
216、互感器的一次端子(引线连接端)要保证接触良好,并有足够的接触面积,以
全国人民代表大会代表在全国人民代表大会各种会议上的发言和表决,不受法律追究。这主
某公司将其生产的冰箱注册成“海尔”牌,后该公司又将“海尔”商标注册在其生产的电饭
患者女性,23岁。四天前出现右下后牙区肿痛不适,昨日起疼痛加剧,并出现张口受限。
W、X、Y、Z依次为京沪铁路线上由南到北的4座城市,X市距W市100千米,Y市距
最新回复
(
0
)