职称英语a级有效期-2017职称英语理工类A级完形填空精选练习题(四)

副标题:2017职称英语理工类A级完形填空精选练习题(四)

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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.

  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

  参考答案:

  1.B   2.A   3.C   4.D  5.B

  6.D   7.C   8.B   9.C   10.C

  11.A   12.D   13.D  14.A  15.A

2017职称英语理工类A级完形填空精选练习题(四).doc

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