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
2015-05-28
34
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/bHl7777K
0
大学英语四级
相关试题推荐
Isitabird?Isitaplane?Isitsuperman?Investorscan’tseemtofigureoutwhethertherecentleapsinstockpricesreprese
A、Hedoesn’twanttoworkforacompanythatseeksitsworkers’privacy.B、Hedoesn’tlikeotherstovisithisFacebook’sperson
MyfavoriteT.V.show?"TheTwilightZone."I【B1】______liketheepisodecalled"ThePrinter’sDevil."It’saboutanewspapered
Disappointment,asuncomfortableandevenpainfulasitcanbeforus,isessentialandimportantonourjourneyofgrowth.Maki
A、Limiteddrivingrange.B、Hugerechargingexpenses.C、Theshortlifeofbatteries.D、Theunaffordablehighprice.A细节辨认题。短文中间部分
Therewasatimewhenanypersonalinformationthatwasgatheredaboutuswastypedonapieceofpaperand【B1】______inafilec
A、BuytheticketsontheInternet.B、Buytheticketsonthephone.C、Buytheticketsatthetrainstation.D、Buytheticketsat
AnewstudysaysmanyyoungpeopleintheUnitedStatestakesubstancesthatareclaimedtomakepeople【B1】______sportsbetter.
A、Workonareport.B、Pickhersonfromschool.C、Meetthemaninhisoffice.D、Preparedinnerforherson.A由女士所说的Mysonwillb
A、HeprefersGermanytootherEuropeancountries.B、Hepreferslargenoteswhentraveling.C、He’drathertaketraveler’schecks
随机试题
A、 B、 C、 D、 B
患者,男,9岁,面中份凹陷,面下1/3高度偏小,下颌前伸,前牙反牙合,可退至切牙合。磨牙近中关系,ANB0°,上前牙略内倾,下前牙直立
急性化脓性牙髓炎的特点不包括
1999年WHO/ISH对一级高血压的诊断标准是
在涉外民事关系中,依《涉外民事关系法律适用法》和司法解释,关于当事人意思自治原则,下列表述中正确的是:
Generalcargorates
根据《中华人民共和国合伙企业法》的有关规定,合伙人承担合伙企业债务责任的方式是()。
在安全生产责任制中,对本单位安全卫生技术负领导责任的是()。
凡是具有消费排他性的物品就称为私用物品。()
Somepeoplearefriendlydrunks,whereasothersarehostile,potentiallyposingadangertothemselvesandothers.Thedifferenc
最新回复
(
0
)