题目内容
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 (51) directional sound alarms capable of guiding you to the exit. Sound Alert, a company (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 in Columbia. (54) produce a wide range of frequencies that enable the brain to determine where the (55) is coming from. Deborah Withington of Sound Alert says that the alarms use most of the frequencies that can be (56) by humans. "It’s a burst of white noise (57) 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 of a large (58) room. It (59) them nearly four minutes to find the door (60) a sound alarm, but 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 more easily than the source of a narrow band. Alarms (63) 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 (64) down stairs. They were (65) with the aid of a large grant from British Nuclear Fuels.
查看答案
搜索结果不匹配？点我反馈
更多问题
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 (51) directional sound alarms capable of guiding you to the exit. Sound Alert, a company (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 in Columbia. (54) produce a wide range of frequencies that enable the brain to determine where the (55) is coming from. Deborah Withington of Sound Alert says that the alarms use most of the frequencies that can be (56) by humans. "It’s a burst of white noise (57) 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 of a large (58) room. It (59) them nearly four minutes to find the door (60) a sound alarm, but 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 more easily than the source of a narrow band. Alarms (63) 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 (64) down stairs. They were (65) with the aid of a large grant from British Nuclear Fuels.
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 (51) directional sound alarms capable of guiding you to the exit. Sound Alert, a company (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 in Columbia. (54) produce a wide range of frequencies that enable the brain to determine where the (55) is coming from. Deborah Withington of Sound Alert says that the alarms use most of the frequencies that can be (56) by humans. "It’s a burst of white noise (57) 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 of a large (58) room. It (59) them nearly four minutes to find the door (60) a sound alarm, but 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 more easily than the source of a narrow band. Alarms (63) 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 (64) down stairs. They were (65) with the aid of a large grant from British Nuclear Fuels.
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 (51) directional sound alarms capable of guiding you to the exit. Sound Alert, a company (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 in Columbia. (54) produce a wide range of frequencies that enable the brain to determine where the (55) is coming from. Deborah Withington of Sound Alert says that the alarms use most of the frequencies that can be (56) by humans. "It’s a burst of white noise (57) 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 of a large (58) room. It (59) them nearly four minutes to find the door (60) a sound alarm, but 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 more easily than the source of a narrow band. Alarms (63) 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 (64) down stairs. They were (65) with the aid of a large grant from British Nuclear Fuels.
The car Cars are an important part of life in the United States. Without a car most people feel that they are poor. And even if a person is poor he doesn’t feel really poor when he has a car. Henry Ford was the man who first started making cars in large numbers. He probably didn’t know how much the car was going to affect American culture. The car made the United Stated a nation on wheels. And it helped make the United States what it is today. There are three main reasons why the car becomes so popular in the United States. First of all, the country is a huge one and Americans like to move around in it. The car provides the most comfortable and cheapest form of transportation. With a car people can go anyplace without spending a lot of money. The second reason cars are popular is the fact that the United States never really developed an efficient and inexpensive form of public transportation. Long-distance trains have never been as common in the country as they are in other parts of the world. Nowadays there is a good system of air-service provided by planes. But it is too expensive to be used frequently. The third reason is the most important one, though. The American spirit of independence is what really made cars popular. Americans don’t like to wait for a bus, or a train or even a plane. They don’t like to have to follow an exact schedule. A car gives them the freedom to schedule their own time. And this is the freedom that Americans want most to have. The gas shortage has caused a big problem for Americans. But the answer will not be a bigger system of public transportation. The real solution will have to be a new kind of car, one that does not use so much gas. With a car people can go ______ easily.
微信支付 
支付宝支付