2015年职称英语(理工类)教材完形填空文章及练习(5)

　　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 / ?nst?: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