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
2024-10-11
11
管理
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. (17)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. (18)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. (19)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. (20)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 pain is a 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、put the theory learned into practice
B、finish and check their homework
C、solve some academic problems
D、cure people who are experiencing hearing loss
答案
A
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3796290.html
相关试题推荐
WhatdidtheInternationalCentersendouttostudents?[br][originaltext]W:A
WhatdidtheInternationalCentersendouttostudents?[br][originaltext]W:A
Aftergoingoversomebasicabouthearing,theteacherwillleadthestudentsto
Whatdothestudentsdoaftertheintroductionofbasicfilmterminology?[br]
Whatdothestudentsdoaftertheintroductionofbasicfilmterminology?[br]
What’sthepercentageoverseasstudentsinCityUniversity,London?[br][origi
Whichreasonforstudents’absencesisdiscussedingreatdetail?[br][origina
Whichreasonforstudents’absencesisdiscussedingreatdetail?[originaltext]
WhydoesRachelaskforhelpfromherteacher?[br][originaltext]W:Oh,hello,
WhydoesRachelaskforhelpfromherteacher?[br][originaltext]W:Oh,hello,
随机试题
[originaltext]Oughtyoutogiveotherpeopleadviceabouthowtolivetheir
PASSAGETWO[br]WhatdoesClaussenthinktobethemaincauseoftheincreased
Weallknowthatamagiciandoesnorreallydependon"magic"toperformhi
Businessvisits,ontheotherhand,tendtobeextremelypunctual.Ifyouar
一种理论是不是真理,根本之点是看它()A.是否与已有的理论相一致 B
模块A提供某个班级某门课程的成绩给模块B,模块B计算平均成绩、最高分和最低分,将
分解法的缺点是( )A.容易使动作割裂,破坏身体练习的技术结构 B.不容易很
投资者认购记名股票时应()缴纳出资A:二次B:一次C:三次D:一次或分次
患者,男,65岁。右上后牙充填物反复脱落,需进行全冠修复。查远中邻大面积银汞充填
关于税收加成的说法,正确的是()。A.在正税以外附加征收的税款称为加成税 B.
最新回复
(
0
)