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
About 23 million headset stereos are sold in the United States each year. Most have one thing in common: they can cause hearing
About 23 million headset stereos are sold in the United States each year. Most have one thing in common: they can cause hearing
admin
2014-02-19
37
问题
About 23 million headset stereos are sold in the United States each year. Most have one thing in common: they can cause hearing loss.
Studies have shown that sound levels from the machines can reach 115 decibels(分贝) or more—roughly equivalent to standing 100 feet from a commercial jet at takeoff. At the level, permanent hearing damage can occur after just 15 minutes. And the earlier a child begins using a headset, the more damage can accumulate. Loud noise causes hearing loss by killing irreplaceable hair cells in the inner ear. Normally, the process occurs slowly as people age, but noise damage can accelerate it.
Noise-induced hearing loss is insidious(不知不觉中发展的); Damage may not be apparent until later in life. Since headsets are used privately, parents often don’t realize how loud their children’s music is.
As a rule, experts say headset sound loud enough to be heard by passers (approximately 100 decibels) can cause damage if used more than two hours a day. The allowable time is halved for every five decibels above that. For example, at 105 decibels, the maximum is one hour.
Whatever your age, noise is dangerous if it hurts your ears, makes them ring or causes you to shout above it to be heard.
选项
A、cause hearing loss
B、cause mental disease
C、make people become mad
D、cause people become old
答案
A
解析
转载请注明原文地址:https://kaotiyun.com/show/UugK777K
本试题收录于:
大学英语三级B级题库大学英语三级分类
0
大学英语三级B级
大学英语三级
相关试题推荐
Peopleassociatecolourswithdifferentthingsandfeelings.Red,forexample,isthecolouroffire,heat,bloodandlife.Peop
Ifyoudonothaveto(11)allthemoneythatyoumake,thenyouareabletosavemoney.Somepeopletrytosave(12).The
Ifyoudonothaveto(11)allthemoneythatyoumake,thenyouareabletosavemoney.Somepeopletrytosave(12).The
Ifyoudonothaveto(11)allthemoneythatyoumake,thenyouareabletosavemoney.Somepeopletrytosave(12).The
Ifyoudonothaveto(11)allthemoneythatyoumake,thenyouareabletosavemoney.Somepeopletrytosave(12).The
Mostpeoplefoundtheseeminglyendlessmeeting(endure)______.
Itisunderstoodthatinafavorableclimate______.Whydidancientpeopleusuallylivewheretherewereplentyoftrees?
Themost(11)waytowelcomethenewyearintheUnitedStatesiswithabigparty.Somepartiesareatprivate(12).Buti
随机试题
社会保险(socialinsurance)
青藏高原的小麦产量高主要是受日照长度的影响。()
新载玻片常带有游离碱质,清洗必须用()
下列关于资源税特点的描述有误的是()。
按照现行《企业所得税暂行条例》规定,乡镇企业可按应缴税款减征()用于补助社会性开支的费用。
下列关于有机化合物的说法正确的是()。
甲公司业务员乙被开除后并未上交相关文件,而是持盖有甲公司公章的合同书与其经常联系的丙公司订立一份合同,丙公司不知道乙已经被甲公司开除,并按照通常做法让乙提走了货款。丙公司要求甲公司履行合同引发争议。乙与丙公司所签订合同效力如何?()
柏拉图《理想国》中的四种美德是()
结构化查询语言SQL是一种(41)语言,其主要功能有(42),它的典型句型为SELECTA1,A2,…,AnFROMr1,r2,…,rmWHEREF其中A1,A2,…,An、r1,r2,…,rm和F分别是(43)。
Onmylastvisit,aboutthreemonthsago,mydoctorhadtoldmethatasa6-foot-tall,39-year-oldman,Ishouldweigharound18
最新回复
(
0
)