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
2024-10-05
48
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:http://tihaiku.com/zcyy/3788073.html
相关试题推荐
Mostofus,asstudents,arecarefulwithourmoneyindailylife:wecollec
Aftergoingoversomebasicabouthearing,theteacherwillleadthestudentsto
Aftergoingoversomebasicabouthearing,theteacherwillleadthestudentsto
Aftergoingoversomebasicabouthearing,theteacherwillleadthestudentsto
Beingimpatientis______withbeingagoodteacher.A、intrinsicB、ingeniousC、in
Teachersneedtobeawareoftheemotional,intellectual,andphysicalchang
Teachersneedtobeawareoftheemotional,intellectual,andphysicalchang
Teachersneedtobeawareoftheemotional,intellectual,andphysicalchang
Teachersneedtobeawareoftheemotional,intellectual,andphysicalchang
Teachersneedtobeawareoftheemotional,intellectual,andphysicalchang
随机试题
Duringtheearlyyearsofthiscentury,wheatwasseenastheverylifeblood
Thespaceshuttleprogramentailstheuseofsophisticatedtechnology.A、enhances
按照《公路土工试验规程》(JTGF40—2007)中土的工程分类方法,依据土的
下列关于安全生产标准化的意义说法正确的是()。A.安全生产标准化建设是落实企业
足月新生儿,心率波动范围是:A.60~140次/分 B.90~120次/分
下列各项,不属于雌激素作用的是( )。A.促进卵泡发育 B.使阴道上皮细胞脱
关于游离胆固醇在调节细胞胆固醇代谢上的作用,错误的是()A.激活ACAT,使游
非交易性外汇敞口可以进一步划分为()。A.结构性敞口和非结构性敞口 B.单币
信托的特点包括()。A.信托财产具有独立性 B.受托人不承担无过失的损失风
下列X线钡剂灌肠检查所见不符合溃疡性结肠炎的是A.病变轻微者可正常 B.肠壁呈
最新回复
(
0
)