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.

　　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