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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 that could be fatal. A company in Leeds could change all that__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 the __5__ is coming 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, he 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 of a large__8__ room. It__9__ them nearly our 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__ on 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
key: BACDB DCBCC ADDAA
冀教版三年级上册UNIT2《Lesson 10 Open,Close》word教案3篇
冀教版三年级上册UNIT1《Lesson 7 How Many》word教案
冀教版三年级上册UNIT1《Lesson 6 A B C D》word教案
冀教版四年级上unit3《Lesson23 Fly and Swim》word教案3篇
冀教版三年级上册UNIT3《Lesson21 Look at Your Hair》word教案2篇
冀教版三年级上册UNIT3《Lesson25 Family》word教案3篇
冀教版四年级上unit2《Lesson12 Cashier and clerk》word教案2篇
冀教版四年级上unit3《Lesson21 Fur and Paws》word教案
冀教版四年级上unit3《Lesson24 Again, please》word教案2篇
冀教版四年级上unit2《Lesson11 Restaurant and Market》word教案2篇
冀教版三年级上册UNIT2《Lesson 11 Red, Yellow, Blue》word教案3篇
冀教版四年级上unit4《Lesson32 Again,please》word教案
冀教版三年级上册UNIT3《Lesson22 Look at Your Eyes》word教案
冀教版三年级上册UNIT1《Lesson 5 1 2 3 4 5》word教案2篇
冀教版三年级上册UNIT1《Lesson 4 Where》word教案2篇
冀教版三年级上册UNIT2《Lesson 13 Black,White, Brown》word教案
冀教版四年级上unit3《Lesson22 Forward and Backward》word教案2篇
冀教版三年级上册UNIT3《Lesson 20 Warm Cool》word教案2篇
冀教版四年级上unit1《Lesson7 I’m lost》word教案2篇
冀教版三年级上册UNIT3《Lesson18 Hot Cold》word教案
冀教版三年级上册UNIT3《Lesson 19 In Out》word教案
冀教版三年级上册UNIT2《Lesson 12 Pink, Orange, Purple, Green》word教案
冀教版四年级上unit2《Lesson13 Where do they work》word教案
冀教版三年级上册UNIT3《Lesson24 Again,Please》word教案
冀教版四年级上unit4《Lesson27 The forest》word教案2篇
冀教版三年级上册UNIT1《Lesson 1 Hello》word教案2篇
冀教版四年级上unit3《Lesson17 The farm》word教案2篇
冀教版四年级上unit4《Lesson28 The monkey judge》word教案2篇
冀教版三年级上册UNIT2《Lesson16 Again ,please》word教案
冀教版三年级上册UNIT1《Lesson 2 Boy,Girl and Teacher》word教案2篇