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
Singing Alarms Could Save the Blind If you cannot see, you may not be able to find your way out of a burning building - and tha
Singing Alarms Could Save the Blind If you cannot see, you may not be able to find your way out of a burning building - and tha
admin
2009-06-15
49
问题
Singing Alarms Could Save the Blind
If you cannot see, you may not be able to find your way out of a burning building - and that could be fatal. A company in Leeds could(51) all that with directional (定向的) sound alarms capable of guiding you to the exit.
Sound Alert, a company run(52) the University of Leeds, is installing the alarms in a residential home for(53) people in Sommerset and a resource centre for the blind in Cumbria. The alarms produce a(54) range of frequencies that enable the brain to(55) where the sound is coming from.
Deborah Withington of Sound Alert says that the alarms use most of the frequencies that can be(56) by humans. "It is a burst of white noise that people say sounds like static (静电噪音) on the radio," she says. "its life-saving potential is(57)."
She conducted an experiment in which people were filmed by thermal-imaging (热效应成像) cameras trying to find their(58) out of a large smoke-filled room. It(59) them nearly four minutes to find the door without a sound alarm,(60) only 15 seconds with one.
Withington studies how the brain(61) sounds at the university. She says that the(62) of a wide band of frequencies can be pinpointed (精确地确定) more easily than the source of a narrow band. Alarms(63) on the same concept have already been installed on emergency vehicles.
The alarms will also include rising or falling frequencies to(64) whether people should go up or down stairs. They were(65) with the aid of a large grant from British Nuclear Fuels.
选项
A、change
B、cure
C、demand
D、set
答案
A
解析
转载请注明原文地址:https://kaotiyun.com/show/ophd777K
本试题收录于:
职称英语理工类C级题库职称英语分类
0
职称英语理工类C级
职称英语
相关试题推荐
Astormmoveddirectlyovertheisland,demolishingbuildingsandfloodingstreets.
Shecannotanswerthisquestionatonce,butcanfindtheanswertoitfromthatbook.
Wecannotgoonquarrellinglikethis.
Hundredsofbuildingswere(wrecked)bytheearthquake.
A.ifthereisn’tenoughdopamineinyourbodyB.whataffectsmusclesallthroughyourbodyC.whichcannotbecuredyetD.
TableMannersandCustomsInGreatBritaintodaygoodmannersattableincludeeatingwiththemouthclosed;notlettingany
TableMannersandCustomsInGreatBritaintodaygoodmannersattableincludeeatingwiththemouthclosed;notlettingany
TableMannersandCustomsInGreatBritaintodaygoodmannersattableincludeeatingwiththemouthclosed;notlettingany
LastFourthofJuly,Pete,a14-year-oldboy,wasenjoyingthelit-upskiesandloudboomsfromthefireworksbeingsetoffinh
随机试题
患者,男性,35岁。感冒后出现双下肢无力、感觉消失,伴尿潴留1天。查体:肌张力低,腱反射消失,双侧剑突以下感觉消失,病理征未引出。患者运动障碍的机制是
胁痛的病理因素为
企业财产清查中,可以作为调整账簿记录的原始凭证的是()。
会计资料是在会计核算过程中形成的、记录和反映实际发生的经济业务事项的资料,包括( )。
溢短装条款是在装运数量上可增减一定幅度,该幅度既可由卖方决定,也可由买方决定,应视合同中的具体规定而定。()
A注册会计师负责审计甲公司20×8年度财务报表。在审计期后事项时,A注册会计师遇到下列事项,请代为作出正确的专业判断。关于A注册会计师对期后事项的责任,下列表述中错误的是()。
设f’(ex)=x2e-x,且f(1)=1,则f(x)=[].
Asmileisastrongsignofafriendlyandopenattitudeandawillingnesstocommunicate.Itisapositive,silentsignsen
Thewomanislookingforhisson.Themandoesn’tknowwhereCandyis.
A、Itsdefinitioniscomplex.B、Itisajourneythatneverends.C、Therearetoomanylandmarks.D、Thedistanceistoolongtome
最新回复
(
0
)