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
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
admin
2013-11-10
59
问题
After going over some basic about hearing, the teacher will lead the students to
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://kaotiyun.com/show/ioFK777K
0
专业英语四级
相关试题推荐
Accordingtothepassage,whatcanweknowabouttheHouseofRepresentatives?
Fromthepassageweknowthat______.
Accordingtothenews,howmanypeoplediedintheattack?
Asthemanagerwasawayonabusinesstrip,Iwasaskedto______theweeklystaffmeeting.(2001年考试真题)
Thesalariesofmostfederalworkersaresetby______.
You’retalkingtomeasifI______anexpert.
Whatdoesthemanneedfromthelibrary?
Whatdoesthemanneedfromthelibrary?
WhichofthefollowingisNOTanevidenceofsomepeople’scarelessnessindailycommunication?
TheLibraryofCongress
随机试题
根据计划内容的明确性标准,可以将计划分类为()
慢性肺源性心脏病可由下列哪些疾病演变而来()
青霉素V钾片的含量,《中国药典》采用
一郊区诊所接生的32周孕龄男婴,出生时轻度窒息,生后第二天不吃不动,呼吸不规则,面色发绀,前囟紧张,四肢肌张力差,拥抱反射消失,以颅内出血收住院治疗。其颅内出血部位最可能为
文化名人的隐退,有两种境界,一是被迫隐退,二是自觉隐退。自觉隐退的人,要么有审时度势、急流勇退的__________,要么有超身世外、看轻名利的__________,不论是哪一种情况,都是值得敬佩的。填入画横线部分最恰当的一项是()。
制定电信资费的()时,应建立听证会制度。
关于爱岗敬业,理解正确的是()。
班级目标是指在一定时期内班级所期望达到的境界。班级目标的设计,主要依据两方面因素:一是国家的教育方针政策、学校的培养目标;二是()。
某公司拟采购一批零件,价值5400元,供应商规定的付款条件如下:立即付款,付5238元;第20天付款,付5292元;第40天付款,付53416元;第60天付款,付全额。要求回答以下互不相关的问题(每年按360天计算):假设目前有一短期投资报酬率
Whereistheman?
最新回复
(
0
)