2015年职称英语考试宝典V11试题免费官方下载.docVIP

2015年职称英语考试宝典V11试题免费官方下载 贡献者： 一、软件基本信息 软件题库基本信息 软件名称： 2015年职称英语考试宝典 软件题库量：专项练习(1843题) , 模拟考场(2556题) , 讲义教学(348题) , 考前押题(555题) , 技巧巩固(270题) , 学习空间(543题) 解题思路：135题 软件价格：298/868元/科 软件授权：共享版 软件语言：中文 运行环境：Win9x/me/NT/2000/XP/2003 2015年职称英语考试宝典精讲速成版(理工类A级):/soft/appid/16720.html 2015年职称英语考试宝典精讲速成版(理工类B级):/soft/appid/16736.html 2015年职称英语考试宝典零基础VIP保过版(综合类B级)：/soft/appid/21354.html 2015年职称英语考试宝典精讲速成版(综合类B级)：/soft/appid/16749.html [试题开始] Sonic Device The other day,Dr.Robert Smith,who is blind,took a remarkable stroll through the campus of theUniversity of California at Santa Barbara. As Dr. Smith walked along the campus, places and impedi-ments(障碍物)in his path seemed to call out their names to him - library here,library here,benchhere,bench here． Dr.Smith was testing a prototype（样机）navigation system for the blind that announced the sur-rounding objects through stereo headphones that were mounted to a computer in his back-pack,crea-ting a virtual reality landscape（仿真影像）.The information came not from some miniature radar butfrom the signals broadcast by the militarys network of global positioning satellites（全球定位卫星）．One day,its developers hope, miniaturized（小型化的）versions of this navigation devices,which nowweighs 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 with Dr. 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 he was at80th and Broadway, but what stores are a-round,and that Zabars delicatessen(熟食店)was up ahead.This navigation system tells you not justwhere there are obstacles, but your overall location geographically. It lets blind users construct amental map of new surroundings and learn their way around. The navigation system uses signals from a com