2011职称英语理工C级：完形填空练习(3)

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Singing Alarms Could Save the Blind
' j0 [# V( C6 b% f; d2 J　　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 　　　　　(1) all that with directional (定向的) sound alarms capable of guiding you to the exit.
: p9 ^  U; m8 `  A- T& G　　Sound Alert, a company run　　　　　 (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. The alarms produce a　　　　　 (4) range of frequencies that enable the brain to 　　　　　(5) where the sound is coming from.
# c% x  d' F+ M! b6 \& o　　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 that people say sounds like static (静电噪音) on the radio," she says. "Its life-saving potential is 　　　　　(7)."
　　She conducted an experiment in which people were filmed by thermal-imaging (热效应成像) cameras trying to find their　　　　　 (8) out of a large smoke-filled room. It　　　　　 (9) them nearly four minutes to find the door without a sound alarm, 　　　　　(10) only 15 seconds with one.
# h6 q7 X, T7 d" F9 B　　Withington studies how the brain 　　　　　(11) sounds at the university. She says that the　　　　　 (12) of a wide band of frequencies can be pinpointed (精确地确定) more easily than the source of a narrow band. Alarms 　　　　　(13) on the same concept have already been installed on emergency vehicles.
2 @" x1 ^* Y0 w　　The alarms will also include rising or falling frequencies to　　　　　 (14) whether people should go up or down stairs. They were 　　　　　(15) with the aid of a large grant from British Nuclear Fuels.
" x  A6 W! o+ W　　1 A change B cure C demand D set
　　2 A to B along C by D with
5 R3 E  q& H' N) t　　3 A slow B deaf C blind D lame
6 d! v: M& i' g　　4 A close B wide C small D high
　　5 A form B affect C create D determine
3 `% Q9 {4 X+ t! o) W6 s　　6 A watched B made C learnt D heard
# O4 n  t  p6 U- I) q- A7 e0 L　　7 A unlikely B uncertain C great D little
) Q: c# R' y! Y3 Q, i* |! b8 _　　8 A life B way C method D skill
3 g- f( A7 o3 H. ]  v　　9 A took B spent C used D had
　　10 A but B even C so D if
　　11 A processes B produces C takes D refuses
# G. c' L9 m6 T8 _- O8 K+ O0 M4 w　　12 A feature B quality C diagram D source
　　13 A accepted B based C kept D focused
9 o8 }2 o  J% D! w0 u8 m9 s1 s2 ~　　14 A describe B demand C consider D indicate
# ~  u* r7 J# X5 s" x7 y　　15 A developed B bought C discovered D sent
　　【参考答案】
　　1. A　　2. C　　3. C　　4. B　　5. D
　　6. D　　7. C　　8. B　　9. A　　10. A
  n/ z! c4 g) Z- }　　11. A　 12. D　 13. B　 14. D　 15. A