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
36
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、but
B、even
C、so
D、if
答案
A
解析
转载请注明原文地址:https://kaotiyun.com/show/4Zhd777K
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
Whereisthenapkinnormallyplacedduringthemeal?Whichofthefollowingshowsgoodtablemanners?
CallingforSafeCelebrations LastFourthofJuly,Pete,a14-year-oldboy,wasenjoyingthelit-upskiesandloudboomsfromthe
CallingforSafeCelebrations LastFourthofJuly,Pete,a14-year-oldboy,wasenjoyingthelit-upskiesandloudboomsfromthe
Henrycannotresistthelureofdrugs.
Astormmoveddirectlyovertheisland,demolishingbuildingsandfloodingstreets.
Wecannotgoonquarrellinglikethis.
LastFourthofJuly,Pete,a14-year-oldboy,wasenjoyingthelit-upskiesandloudboomsfromthefireworksbeingsetoffinh
Thelittleboywassofascinatedbythemightyriverthathewouldspendhourssittingonitsbankandgazingatthepassingboa
MindThoseMannersontheSubwaySo,thereyouare,justsittingthereinthesubwaycar,enjoyingthatbookyoujustbought.(4
随机试题
设有上三角矩阵(aij)n×n,将其上三角元素逐行存于数组B(1:m)中(m充分大),使得B[k]=aij,且k=fi(i)+f2(j)+c。试推导出函数f1,f2和常数c(要求f1和f2中不含常数项)。
阅读下面的文字:暮色昏暗。大片的湿雪绕着刚点亮的街灯懒洋洋地飘飞,落在房顶、马背、肩膀、帽子上,集成又软又薄的一层。车夫姚纳•波达波夫周身雪白,像是一个幽灵。他在赶车座位上坐着,一动也不动,身子往前伛着,伛到了活人的身子所能伛到的最大限度。即使有
格林-巴利综合征的病人,出现呼吸肌重度麻痹时应()
不可逆性抑制剂与酶的结合方式是
免征额是指对征税对象总额中免予征税的数额。即将纳税对象中的一部分给予减免,只就减除后的剩余部分计征税款。()
初一语文单元测验中,王老师发现某学生抄袭了一道1分的题目。阅卷时,他在这个学生的试卷上打分为“90-1”。该生拿到试卷后非常惭愧,要求改为89分。老师给他批了一个“89+1”,并对他说:“知错能改就好。这1分是对你能认识和改正错误的奖励。”王老师的做法所体
简述国际法基本原则的主要内容。
全球变暖是老天爷对人类开出的罚单,便宜且容易利用的矿石燃料,是推动近现代经济增长的重要源泉之一,但科学证明这可能带来灾难性的气候变化。目前不得不面对的现实是,人类必须为自己的排放埋单。如果世界上只有一个国家,此事就相对简单,不管成本多大,最终都由这个国家承
特别行政区的行政机关是()。
下面关于常成员函数的说法中正确的是()。
最新回复
(
0
)