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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 th
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 th
admin
2016-07-17
26
问题
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 change all that【C1】______directional sound alarmscapable of guiding you to the exit.
Sound Alert,a compa【C2】______the University of Leeds, is installing the alarms in aresidential home for【C3】______people in Sommerset and a resource centre for the blind in Cumbria.【C4】______produce a wide range of frequencies that enable the brain to determine where the【C5】______is coming from.
Deborah Withington of Sound Alert says that the alarms use most of the frequencies that canbe【C6】______by humans. "It is a burst of white noise【C7】______people say sounds likestatic on the radio," she says. " Its life-saving potential is great. "
She conducted an experiment in which people were filmed by thermal-imaging cameras tryingto find their way out of a large【C8】______ room. It【C9】______them nearly four minutesto find the door【C10】______a sound alarm, but only 15 seconds with one.
Withington studies how the brain【C11】______ sounds at the university. She says that the【C12】______ of a wide band of frequencies can be pinpointed more easily than the source of anarrow band. Alarms【C13】______the same concept have already been installed on emergency vehicles.
The alarms will also include rising or falling frequencies to indicate whether people should goup【C14】______ down stairs. They were【C15】______ with the aid of a large grant from BritishNuclear Fuels.
【C15】
选项
A、developed
B、determined
C、discovered
D、delivered
答案
A
解析
首先确定主语They指的是第一句中的主语The alarms,后半句说这种设备得到大笔资助。根据上文内容,我们知道资助的目的是开发这种alarms,所以应该选择developed。
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