2014年职称英语(理工类)教材完形填空文章及练习(5)

　　Singing Alarms Could Save the Blind
　　If you cannot see, you may not be able to1 find your way out of a burning building — and that could be fatal. A company in Leeds could change all that2____1____ directional sound alarms capable of guiding you to the exit.
　　Sound Alert, a company____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.____4____ produce a wide range of frequencies that enable the brain to determine where the____5____ is coining 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____7____ people say sounds like static 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 of3 a large____8____ room. It____9____ them nearly four minutes to find the door____10____ a sound alarm, but 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 more easily than the source of a narrow band. Alarms____13____ the same concept have already been installed on emergency vehicles.
　　The alarms will also include rising or falling frequencies to indicate whether people should go up____14____ down stairs. They were____15____ with the aid of a large grant from British Nuclear Fuels.
　　词汇：
　　directional / d?'rek??nl; da?- / adj.定向的
　　exit / 'eks?t / n.出口
　　install / ?n'st?:l / v.安装
　　residential / rez?'den??l / adj.居住的
　　static / 'st?t?k / n.静电噪声
　　potential / p?'ten??l / n.潜力
　　thermal-imaging热效应成像
　　pinpoint / 'p?np??nt / v.精确地确定
　　concept / 'k?nsept / n.概念，观念
　　emergency / ?'m??d??ns? / n.紧急情况
　　grant / grɑ?nt / n.授予物，准许
　　注释：
　　1.在谓语动词中，不能并列使用两个情态动词，如may和can就不能并列使用。如果由于表达需要，要同时用“可能”和“能够”，就得说(写)成may be able to。如：
　　I may be able to come tomorrow, but I cannot promise.
　　我可能明天来，但我不可能作出承诺。
　　2.that指第一句所表达的意思。
　　3.... find their way out of ...：意为“找到从出去的路”。
　　练习：
　　1.A　without B　with C　having D　selling
　　2.A　run by B　changed by C　decorated by D　criticized by
　　3.A　slow B　deaf C　blind D　lame
　　4.A　Alarms B　Alarm C　The alarm D　The alarms
　　5.A　noise B　sound C　music D　bell
　　6.A　watched B　produced C　learnt D　heard
　　7.A　where B　what C　that D　how
　　8.A　smoked B　smoke-filled C　filled with smoke D　smoke-filling
　　9.A　has taken B　takes C　took D　will take
　　10.A　on B　near C　without D　from
　　11.A　processes B　produces C　possesses D　proceeds
　　12.A　feature B　quality C　diagram D　source
　　13.A　basis on B　base on C　basing on D　based on
　　14.A　or B　and C　but D　otherwise
　　15.A　developed B　determined C　discovered D　delivered