首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
A、Because it provides precise direction. B、Because it is affordable to ordinary users. C、Because it is the trend of the century.
A、Because it provides precise direction. B、Because it is affordable to ordinary users. C、Because it is the trend of the century.
admin
2014-08-29
41
问题
GPS stands for the Global Positioning System. It refers to a system of satellites and receivers that allow people and devices to detect their precise location on the earth. The heart of the system relies on 24 satellites that orbit the earth twice per day. Devices that are equipped with GPS equipment receive transmissions from at least a few of the satellites and are able to collect very precise positioning data. The first GPS satellite was launched in 1974 and the 24th was launched in 1994. The system is operated by the United States Department of Defense and the use of the system is free for anyone. New satellites are periodically launched to replace aging ones. As the technology has improved, the cost of GPS devices has greatly declined while the accuracy has increased. Small portable GPS receivers have become very affordable, and the accuracy is amazing. Accuracy varies based on various factors, but it can be as good as a few meters! Land-based supplementary devices can be used to improve accuracy if higher precision is required. The application of the GPS is very broad, and as the prices come down the number of uses is increasing. Portable GPS devices are used by fishermen to help them sail around the wild. Many new cars are being equipped with GPS systems to help drivers with finding directions. The military uses GPS to guide cruise missiles to pre-specified targets.
16. According to the passage, what is the most important part of the global positioning system?
17. Which aspect of the GPS is emphasized by the speaker?
18. According to the passage, why is the use of GPS increasing?
选项
A、Because it provides precise direction.
B、Because it is affordable to ordinary users.
C、Because it is the trend of the century.
D、Because it is portable for anyone.
答案
B
解析
转载请注明原文地址:https://kaotiyun.com/show/EJv7777K
0
大学英语四级
相关试题推荐
A、Adviceonthepurchaseofcars.B、Informationaboutthenewgreen-fuelvehicles.C、Trendsforthedevelopmentofthemotorcar
WhenMomandDadGrowOldA)Theprospectoftalkingtoincreasinglyfragileparentsabouttheirfuturecanbe"oneofthemostd
围棋(thegameofgo)起源于中国,是世界上最古老的棋类。围棋是一种智力型运动,学围棋既可锻炼提高人们的逻辑思维能力,又能陶冶性情,培养人们顽强、冷静、沉着的性格。因此,它越来越受到现代人的欢迎。现在,世界上已有40多个国家和地区开展了围棋运动
A、Throughnaturalselection.B、Throughpeople’straining.C、Throughtheirmembers’protection.D、Throughbornabilities.A
A、Becausetheyhavenowings.B、Becausetheyarelighter.C、Becausetheyaren’twelltrained.D、Becausetheyareheavy.D
A、Eathouseplants.B、Fulfilltheroleofhousepet.C、Grazeonthecarpeting.D、Climbonthefurniture.B
A、Oncampus.B、Atagallery.C、Inabookstore.D、Atagrocerystore.B关键词题。女士问她能为男士做点什么,男士说自己只是看看这些油画并赞扬了店不错。由油画(paintings)可以推断,
Thebenefitsofquittingsmoking—reducedriskofcancerandmanyotherhealthproblems—areknown.Butformillionsofsmokers,t
Fewhumanrecordssurviveforlong,the16000-year-oldPaleolithiccavepaintingsatLascaux,France,beingoneexception.Now
HavingKidsMakesYouHappy?A)WhenIwasgrowingup,ourformerneighbors,whomwe’llcalltheSloans,weretheonlycoupleon
随机试题
服务产品品质优劣的衡量标准在于_______。
经营杠杆系数越高()
关于高血压的联合治疗以下正确的是
新生儿的死亡率最高的时期是
知母的作用是()
线路竣工测量的工作内容包括()。
常温下,某溶液中由水电离的c(H+)=1×10-13mol/L,该溶液可能是()。①氯化铵水溶液②二氧化硫水溶液③氢氧化钠水溶液④硝酸钠水溶液
中华人民共和国国家工作人员在中华人民共和国领域外犯我国刑法规定之罪的,()。
劳务派遣是指劳务派遣机构受特定企业委托招聘员工,并与之签订劳动合同,将员工派遣到企业工作,其劳动过程由企业管理,其工资、福利、社会保险费等由企业提供给派遣机构,再由派遣机构支付给员工,并为员工办理社会保险登记和缴费等事务的一种特殊用工形式。根据上述定义,下
Manyfamousscientists______atthemeetingheldinBeijingyesterday.
最新回复
(
0
)