职称英语考试理工a2018答案:2017职称英语考试理工类备考之完形填空习题（十）

　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 adj.定向的

　　exit n.出口

　　install v.安装

　　residential adj.居住的

　　static n.静电噪声

　　potential n.潜力

　　thermal-imaging热效应成像

　　pinpoint v.精确地确定

　　concept n.概念，观念

　　emergency n.紧急情况

　　grant 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。

　　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”。

2017职称英语考试理工类备考之完形填空习题（十）.doc

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