【单选题】
SingingAlarmsCould Save theBlind
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 (51) all that with directional (定向的) sound alarms capable of guiding you to the exit,
SoundAlert, a company run (52) the University of Leeds, is installing the alarms in a residential home for (53) people in Sommerset and a resource centre for the blind inCumbriA、The alarms produce a (54) range of frequencies that enable the brain to (55) where the sound is coming from.
Deborah Withington of SoundAlert says that the alarms use most of the frequencies that can be (56) by humans. "It is a burst of white noise that people say sounds like static (静电噪声) on the radio," she says. "Its life-saving potential is (57) . "
She conducted an experiment in which people were filmed by thermal-imaging (热效应成像) cameras trying to find their (58) out of a large smoke-filled room. It (59) them nearly four minutes to find the door without a sound alarm, (60) only 15 seconds with one.
Withington studies how the brain (61) sounds at the university. She says that the (62) of a wide band of frequencies can be pinpointed (精确地确定) more easily than the source of a narrow banD、Alarms (63) on the same concept have already been installed on emergency vehicles.
The alarms will also include rising or falling frequencies to (64) whether people should go up or down stairs. They were (65) with the aid of a large grant fromBritish Nuclear Fuels.
A．slow
B、deaf C．blind D．lame
网考网参考答案：C
网考网解析：
该公司发明的这种东西主要是供眼睛不好的人使用的。可见C正确。 document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>
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 (51) all that with directional (定向的) sound alarms capable of guiding you to the exit,
SoundAlert, a company run (52) the University of Leeds, is installing the alarms in a residential home for (53) people in Sommerset and a resource centre for the blind inCumbriA、The alarms produce a (54) range of frequencies that enable the brain to (55) where the sound is coming from.
Deborah Withington of SoundAlert says that the alarms use most of the frequencies that can be (56) by humans. "It is a burst of white noise that people say sounds like static (静电噪声) on the radio," she says. "Its life-saving potential is (57) . "
She conducted an experiment in which people were filmed by thermal-imaging (热效应成像) cameras trying to find their (58) out of a large smoke-filled room. It (59) them nearly four minutes to find the door without a sound alarm, (60) only 15 seconds with one.
Withington studies how the brain (61) sounds at the university. She says that the (62) of a wide band of frequencies can be pinpointed (精确地确定) more easily than the source of a narrow banD、Alarms (63) on the same concept have already been installed on emergency vehicles.
The alarms will also include rising or falling frequencies to (64) whether people should go up or down stairs. They were (65) with the aid of a large grant fromBritish Nuclear Fuels.
A．slow
B、deaf C．blind D．lame
网考网参考答案：C
网考网解析：
该公司发明的这种东西主要是供眼睛不好的人使用的。可见C正确。 document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>
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