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、The accuracy of GPS system. B、The cost of GPS devices. C、The weight of GPS devices. D、The speed of information transmission. A
A、The accuracy of GPS system. B、The cost of GPS devices. C、The weight of GPS devices. D、The speed of information transmission. A
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、The accuracy of GPS system.
B、The cost of GPS devices.
C、The weight of GPS devices.
D、The speed of information transmission.
答案
A
解析
转载请注明原文地址:https://kaotiyun.com/show/bJv7777K
0
大学英语四级
相关试题推荐
A、Beauty.B、Loyalty.C、Luck.D、Durability.A短文中提到,钻戒代表美丽,故答案为A)。
Allaroundtheworldmillionsofpeopleareeagerlywaitingforthe16thofJuly.That’sbecauseitisthedaywhenthesixthHa
Britonsareincreasinglyentertainingguestsathomewithdinner,filmandkaraokenights,(1)______bytelevisionshowsoncookin
A、Byaworkingclassfamilywithparentsandchildren.B、Bythewriters’experience.C、Bycharactersandcurrentissuesrepresen
A、Sheissatisfiedwithit.B、Shefeelsit’stoosmall.C、Shethinkstherentisunacceptable.D、Shefindsthetrafficnotconve
A、Becauseshebecametootiredafterthelongtrip.B、Becauseherparents’friendsdidn’ttakeherthere.C、Becauseshehadtod
A、Theregistrationforaphotographycourse.B、Aphotographyexhibition.C、Thevarietiesofphotographycourses.D、Someinformat
A、Sheshowsjealousyaboutthebeauty.B、Sheshowssatisfactiontothepicture.C、Make-upcanturntheuglytobethebeauty.D、
A、Passingatesttowritetravelguides.B、Finishingherworkassoonaspossible.C、Checkingallthefactstobewritteninthe
A、Takeherbalmedicine.B、Seeanotherdoctor.C、Drinkchickensoup.D、Stayinbed.A选项中的Takeherbalmedicine,Seeanotherdoctor等
随机试题
治疗弥漫性泛细支气管炎最有效的药物为
在心动周期中,下列哪一时期的心室内压最低
注册咨询工程师(投资)继续注册申请由初审机构提出初审意见,报()批准并在注册证上签署继续注册有效期。
账户的基本结构包括( )。
企业自行研究开发无形资产过程中发生的资本化的开发支出期末应列示于资产负债表“开发支出”项目中。()
下列有关房产税税率的表述,符合现行规定的有()。
(2004年真题)音像制品编辑人员需承担的工作包括()等。
一Sleepwelllastnight?—Farfromthat!Mynextdoorneighbor()musicprettyloud.
Atsometimeinyourlifeyoumayhaveastrongdesiretodosomethingstrangeorterrible.However,chancesarethatyoudo
FOUNDBlackwalletwithmoney.CometoRoom502intheevening,orcall9796788WANTEDIMMEDIATELYAboyoragirl
最新回复
(
0
)