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 ___________ all that with directional sound alarms capable of guiding you to the exit.
Sound Alert, a company run _________ the University of Leeds, is installing the alarms in a residential home for _________ people in Sommerset and a resource centre for the blind in Cumbria. The alarms produce a _________ range of frequencies that enable the brain to_________ where the sound is coming from.
Deborah Withington of Sound Alert says that the alarms use most of the frequencies that can be_________ by humans. It is a burst of white noise that people say sounds like static on the radio, she says. Its life-saving potential is_________ .
She conducted an experiment in which people were filmed by thermal-imaging cameras trying to find their _________ out of a large smoke-filled room. It_________ them nearly four minutes to find the door without a sound alarm,_________ only 15 seconds with one.
Withington studies how the brain _________ sounds at the university. She says that the _________ of a wide band of frequencies can be pinpointed more easily than the source of a narrow band. Alarms _________ on the same concept have already been installed on emergency vehicles.
The alarms will also include rising or falling frequencies to_________ whether people should go up or down stairs. They were_________ with the aid of a large grant from British Nuclear Fuels.
第 51 题
A.change
B.cure
C.demand
D.set
【正确答案】: A
第 52 题
A.to
B.along
C.by
D.with
【正确答案】: C
第 53 题
A.slow
B.deaf
C.blind
D.lame
【正确答案】: C
第 54 题
A.close
B.wide
C.small
D.high
【正确答案】: B
第 55 题
A.form
B.affect
C.create
D.determine
【正确答案】: D
第 56 题
A.watched
B.made
C.learnt
D.heard
【正确答案】: D
第 57 题
A.unlikely
B.uncertain
C.great
D.little
【正确答案】: C
伊索寓言Lesson 31 The young thief and his mother 小偷和他的母亲
少儿英语单词顺口溜:衣物英语单词歌
幼儿英语单词顺口溜:学生的一天
幼儿英语单词大全:交通工具英语名称(vehicles)
幼儿英语水果名称:字母T、V、W开头
伊索寓言Lesson 33 The two pots 两口锅
幼儿英语水果名称:字母A、B开头
幼儿英语水果名称:字母F、G、H、J、K开头
幼儿英语单词大全:人物英语名称(people人物)
幼儿英语单词顺口溜:一数到十
幼儿英语单词顺口溜:家庭成员
少儿英语单词顺口溜:课间活动动副词组英语单词歌
单词辨义:look,look at,see,你知道怎么看?
单词辨义:what, how, where, who和how old怎么用好?
幼儿英语单词顺口溜:动物名词歌
幼儿英语单词顺口溜:身体部位
幼儿英语水果名称大全
幼儿英语水果名称:字母C、D开头
幼儿英语单词顺口溜:季节与天气英语单词歌
幼儿英语单词顺口溜:交通工具
幼儿英语单词大全:食品、饮料(food & drink)
幼儿英语水果名称:字母L、M、N开头
幼儿英语单词顺口溜:常见水果
少儿英语单词顺口溜:工作和职业英语单词歌
幼儿英语单词大全:蔬菜英语名称(vegetables)
幼儿英语单词大全:植物英语名称(plants)
幼儿英语单词大全:衣服英语名称(clothes)
幼儿英语单词大全:气象英语名称(weather)
幼儿英语单词大全
伊索寓言Lesson 32 Hercules and the waggoner 大力神与车夫
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