未分类题

Sonic Device
The other day, Dr. Robert Smith, who is blind, took a remarkable stroll through the campus of the University of California at Santa BarbarA.As Dr. Smith walked along the campus, places and impediments(障碍物)in his path seemed to call out their names to him--'library here, library here', 'bench here, bench here'.
Dr. Smith was testing a prototype (样机) navigation system for the blind that announced the surrounding objects through stereo headphones that were mounted to a computer in his back-pack(背包), creating a virtual reality landscape(仿真景象). The information came not' from some miniature radar but from the signals broadcast by the military's network of global positioning satellites(全球定位系统). One day, its developers hope,miniaturized(小型化的)versions of this navigation device, which now weighs twenty-eight pounds, will help the blind navigate unfamiliar neighborhoods.
'With this system you do not need to know a thing in advance about where you are going,' said Dr. Roberta Klatzky, a psychologist at Carnegie-Mellon University who is working withDr. Smith to develop the navigating devicE.Dr. Michael Oberdor.of the National Eye Institute said, 'A blind person could walk down the street and know not just that he was at 80th and Broadway, but what stores are around, and that Zabar's delicatessen(熟食店)was up aheaD.This navigation system tells you not just where there are obstacles, but your overall location geographically. ' It lets blind users construct a mental map of new surroundings and learn their way arounD.
The navigation system uses signals from a computerized map to create a 'virtual acoustic display(仿真声音显示). ' This is a talking map in which large objects seem to announce themselves in the headphones with the precise timing and loudness that would be the case if the objects were actually making a sounD.This allows the blind person to sense immediately his or her distance or direction, and use that information for guidancE.While no one knows whether it is because blind people tend to develop a sharper sense of hearing, those who have tried the system say that they quickly adapt to locating an object through the sounds. 'One of the crucial features of this system is that it takes advantage
of sensory psychophysics(感官心理物理学) - how the brain interprets signals from outside to make a map of your surroundings so you can navigate,' Dr, Oberdor saiD.
第 16 题 With the help of this sonic device, obstacles in the way will speak out their namE.
A.Right
B.Wrong
C.Not mentioned

A.Dr.
B.
'With
C.of
D.
The
E.
A.Right
F.Wrong
G.Not

【参考答案】

B
本题给出的信息是错误的。文章第一段提到:“…placesandimpediments(障碍物)inhispa......

(↓↓↓ 点击下方‘点击查看答案’看完整答案 ↓↓↓)
热门 试题

未分类题
English and English Community1. There is no denying that English is a useful languagE.The people who speak English today make up the largest speech community in the world with the exception of speakers of ChinesE.Originally(起初) they were small tribes of people from northern Europe who settled in EnglanD.Their languages became more and more similar to each other. Finally, the language had enough uniformity(统一性)to be used by all speakers in EnglanD.The people were united into a speech community through their shared languagE.2.A speech community is similar to other kinds of communities. The people whomake up the community share a common languagE.Often they live side by side, as they do in a neighborhood, a village, or a city. More often they form. a whole country. National boundaries(边界), however, are not always the same as the boundaries of a speech community. A speech community is any group of people who speak the same language no matter where they happen to livE.3. We may say that anyone who speaks English belongs to the English speech com-munity. For convenience, we may classify the speakers into two groups: one in which the speakers use English as their native language, the other in which the speakers learn English as a second language for the purpose of education, commerce, and so on.4. English serves as an alternative language(替代语言) in several areas of public activity for the many nations of the world that employ it as an international second languagE.English has been adopted as the language of air traffic, commerce, as well as international diplomacy. Moreover, English is the language of the majority of published materials in the world so that education has come to rely heavily on an understanding of English.5. Learning a second language extends one's vision and expands the minD.The history and literature of a second language record the real and fictional(虚构的)lives of the people and their culture; the knowledge of them adds to our ability to understand and to feel as they feel. Learning English as a second language provides another means of communication through which the windows of the entire English speech community becomes a part of our heritagE.A.The Wide Use of EnglishB.Historical Account of English and Its CommunityC.The Advantages of Learning a Second LanguageD.The Composition of the English CommunityE.The Threat that English Poses to Other LanguagesF.The Definition of a Speech Community第 23 题 Paragraph 2 ____
A.The
B.
2.A
C.
3.
D.
4.
E.
5.
F.The
G.Historical
H.The
I.The
J.The
K.The