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 ___________（1） all that with directional（定向的） sound alarms capable of guiding you to the exit.
Sound Alert,a company run _________（2） the University of Leeds,is installing the alarms in a residential home for _________（3） people in Sommerset and a resource centre for the blind in Cumbria. The alarms produce a _________ （4） range of frequencies that enable the brain to_________ （5） where the sound is coming from.
Deborah Withington of Sound Alert says that the alarms use most of the frequencies that can be_________（6） by humans. "It is a burst of white noise that people say sounds like static （靜電噪音） on the radio," she says. "Its life-saving potential is_________ （7）。"
She conducted an experiment in which people were filmed by thermal-imaging （熱效應(yīng)成像） cameras trying to find their _________ （8） out of a large smoke-filled room. It_________ （9） them nearly four minutes to find the door without a sound alarm,_________ （10） only 15 seconds with one.
Withington studies how the brain _________（11） sounds at the university. She says that the _________ （12） of a wide band of frequencies can be pinpointed （精確地確定） more easily than the source of a narrow band. Alarms _________ （13） on the same concept have already been installed on emergency vehicles.
The alarms will also include rising or falling frequencies to_________ （14） whether people should go up or down stairs. They were_________ （15） with the aid of a large grant from British Nuclear Fuels.
第 51 題
A.change
B.cure
C.demand
D.set
[正確答案]： A
第 52 題
A.to
B.along
C.by
D.with
[正確答案]： C
第 53 題
A.slow
B.deaf
C.blind
D.lame
[正確答案]： C
第 54 題
A.close
B.wide
C.small
D.high
[正確答案]： B
第 55 題
A.form
B.affect
C.create
D.determine
[正確答案]： D
第 56 題
A.watched
B.made
C.learnt
D.heard
[正確答案]： D
第 57 題
A.unlikely
B.uncertain
C.great
D.little
[正確答案]： C
第 58 題
A.life
B.way
C.method
D.skill
[正確答案]： B
第 59 題
A.took
B.spent
C.used
D.had
[正確答案]： A
第 60 題
A.but
B.even
C.so
D.if
[正確答案]： A
第 61 題
A.processes
B.produces
C.takes
D.refuses
[正確答案]： A
第 62 題
A.feature
B.quality
C.diagram
D.source
[正確答案]： D
第 63 題
A.accepted
B.based
C.kept
D.focused
[正確答案]： B
第 64 題
A.describe
B.demand
C.consider
D.indicate
[正確答案]： D
第 65 題
A.developed
B.bought
C.discovered
D.sent
[正確答案]： A
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 ___________（1） all that with directional（定向的） sound alarms capable of guiding you to the exit.
Sound Alert,a company run _________（2） the University of Leeds,is installing the alarms in a residential home for _________（3） people in Sommerset and a resource centre for the blind in Cumbria. The alarms produce a _________ （4） range of frequencies that enable the brain to_________ （5） where the sound is coming from.
Deborah Withington of Sound Alert says that the alarms use most of the frequencies that can be_________（6） by humans. "It is a burst of white noise that people say sounds like static （靜電噪音） on the radio," she says. "Its life-saving potential is_________ （7）。"
She conducted an experiment in which people were filmed by thermal-imaging （熱效應(yīng)成像） cameras trying to find their _________ （8） out of a large smoke-filled room. It_________ （9） them nearly four minutes to find the door without a sound alarm,_________ （10） only 15 seconds with one.
Withington studies how the brain _________（11） sounds at the university. She says that the _________ （12） of a wide band of frequencies can be pinpointed （精確地確定） more easily than the source of a narrow band. Alarms _________ （13） on the same concept have already been installed on emergency vehicles.
The alarms will also include rising or falling frequencies to_________ （14） whether people should go up or down stairs. They were_________ （15） with the aid of a large grant from British Nuclear Fuels.
第 51 題
A.change
B.cure
C.demand
D.set
[正確答案]： A
第 52 題
A.to
B.along
C.by
D.with
[正確答案]： C
第 53 題
A.slow
B.deaf
C.blind
D.lame
[正確答案]： C
第 54 題
A.close
B.wide
C.small
D.high
[正確答案]： B
第 55 題
A.form
B.affect
C.create
D.determine
[正確答案]： D
第 56 題
A.watched
B.made
C.learnt
D.heard
[正確答案]： D
第 57 題
A.unlikely
B.uncertain
C.great
D.little
[正確答案]： C
第 58 題
A.life
B.way
C.method
D.skill
[正確答案]： B
第 59 題
A.took
B.spent
C.used
D.had
[正確答案]： A
第 60 題
A.but
B.even
C.so
D.if
[正確答案]： A
第 61 題
A.processes
B.produces
C.takes
D.refuses
[正確答案]： A
第 62 題
A.feature
B.quality
C.diagram
D.source
[正確答案]： D
第 63 題
A.accepted
B.based
C.kept
D.focused
[正確答案]： B
第 64 題
A.describe
B.demand
C.consider
D.indicate
[正確答案]： D
第 65 題
A.developed
B.bought
C.discovered
D.sent
[正確答案]： A