2019年职称英语考试综合类B级完形填空练习题(13)

 　　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 (静电噪音) on the radio," she says. "Its life-saving potential is_________ (7)."

　　She conducted an experiment in which people were filmed by thermal-imaging (热效应成像) 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 (精确地确定) 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.

　　51.A.change

　　B.cure

　　C.demand

　　D.set

　　52.A.to

　　B.along

　　C.by

　　D.with

　　53.A.slow

　　B.deaf

　　C.blind

　　D.lame

　　54.A.close

　　B.wide

　　C.small

　　D.high

　　55.A.form

　　B.affect

　　C.create

　　D.determine

　　56.A.watched

　　B.made

　　C.learnt

　　D.heard

　　57.A.unlikely

　　B.uncertain

　　C.great

　　D.little

　　58.A.life

　　B.way

　　C.method

　　D.skill

　　59.A.took

　　B.spent

　　C.used

　　D.had

　　60.A.but

　　B.even

　　C.so

　　D.if

　　61.A.processes

　　B.produces

　　C.takes

　　D.refuses

　　62.A.feature

　　B.quality

　　C.diagram

　　D.source

　　63.A.accepted

　　B.based

　　C.kept

　　D.focused

　　64.A.describe

　　B.demand

　　C.consider

　　D.indicate

　　65.A.developed

　　B.bought

　　C.discovered

　　D.sent

　　参考答案：ACCBD DCBAA ADBDA