Singing Alarms
来源 :中华考试网 2018-02-10
中根据材料,回答下列问题。
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 change all that:________(51 ) directional sound alarms capable of guiding you to the exit.
Sound Alert, a company " :________(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. :________ (54 ) produce a wide range of frequencies that enable the brain to determine where the:________( 55 ) 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 :________ (57) people say sounds hkestatic on the radio," she says. "Its life-saving potential is great. "
She conducted an experiment in which people were filmed by thermal-imaging cameras trying to find their way out of a large:________ (58) room. It :________ (59) them nearly four minutes to find the door:________ (60) a sound alarm, but 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 mote easily than the source of a narrow band. Alarms:________(63)the same concept have already been installed on emergency vehicles.
The alarms will also include rising or failing frequencies to indicate whether people should goup:________(64) down stairs. They were :________ ( 65 ) with the aid of a large grant from British Nuclear Fuels.
不定项选择题第1题
________
A.smoked
B.smoke-filled
C.filled with smoke
D.smoke-filling
参考答案:B
不定项选择题第2题
________
A.or
B.and
C.but
D.otherwise
参考答案:A
不定项选择题第3题
________
A.Alarms
B.Alarm
C.The alarm
D.The alarms
参考答案:D
不定项选择题第4题
________
A.feature
B.quality
C.diagram
D.source
参考答案:D
不定项选择题第5题
________
A.with
B.at
C.without
D.over
参考答案:C
不定项选择题第6题
________
A.developed
B.determined
C.discovered
D.delivered
参考答案:A
不定项选择题第7题
________
A.slow
B.deaf
C.blind
D.lame
参考答案:C
不定项选择题第8题
________
A.watched
B.produced
C.learnt
D.heard
参考答案:D
不定项选择题第9题
________
A.without
B.with
C.having
D.selling
参考答案:B
不定项选择题第10题
________
A.where
B.what
C.that
D.how
参考答案:C
不定项选择题第11题
________
A.run by
B.changed by
C.decorated by
D.criticized by
参考答案:A
不定项选择题第12题
________
A.processes
B.produces
C.possesses
D.proceeds
参考答案:A
不定项选择题第13题
________
A.has taken
B.take
C.took
D.will take
参考答案:C
不定项选择题第14题
________
A.noise
B.sound
C.music
D.bell
参考答案:B
不定项选择题第15题
________
A.basis on
B.base on
C.basing on
D.based on
参考答案:D