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
38
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
WhenMomandDadGrowOldA)Theprospectoftalkingtoincreasinglyfragileparentsabouttheirfuturecanbe"oneofthemostd
A、Goshoppingwithher.B、Dohomeworkforher.C、Repairhercomputer.D、Lendhisbicycletoher.B
Allaroundtheworldmillionsofpeopleareeagerlywaitingforthe16thofJuly.That’sbecauseitisthedaywhenthesixthHa
A、Thegovernmentshouldputabanondrinking.B、Theshop-keepersrefusetosellalcoholtopeople.C、Thepoliceshoulddecidew
Britonsareincreasinglyentertainingguestsathomewithdinner,filmandkaraokenights,(1)______bytelevisionshowsoncookin
A、Thehamburgersweredelicious.B、Tedatetoomanyhamburgers.C、Pigslovehamburgerstoo.D、Tedlooksoverweight.B对话中男孩提到Iat
Eatingvegetablesisgood.Asevidenceofthehealthbenefitsofvegetableshas【S1】_____,publichealthscientists,nutritionist
Whowantstopayfor"D"-qualityplumbing(管道)?Flytheskieswitha"D"-ratedpilot?Settle【C1】_____a"D"restaurant?Ex
Fewhumanrecordssurviveforlong,the16000-year-oldPaleolithiccavepaintingsatLascaux,France,beingoneexception.Now
A、Hewasgiventhewrongbloodbymistake.B、Hisorgansbrokedownduringthesurgery.C、Hewastooweaktohaveasurgery.D、He
随机试题
背景某社区活动中心工程,3层框架结构,无地下室,总建筑面积2417m2,层高均为4.5m,局部有1.2m深大截面梁。由于地质条件比较好,设计为放大基础加地连梁,房心回填土后夯实,最后再施工首层地面。在一层顶梁板施工时,钢筋安装、模板支设完毕后,开始申请
下列关于灵活就业人员及城乡居民基本养老保险的说法,错误的是()。
若消费者的消费低于他的预算线消费,则表明消费者()。
可以上诉的裁定,当事人有权在裁定书送达之日起()日内向上一级人民法院提起上诉;当事人不服第一审判决的,有权在判决书送达之日起()日内向上一级人民法院提起上诉。
劳动法律关系包括()。
课外、校外教育的主要特点是()
激光的本意是通过受激发射而实现光波放大。受激发射的理论是()在1917年提出的。
免费增值模式指通过提供免费基本服务来吸引用户,然后再对额外的高级服务收费。根据上述定义.下列属于免费增值模式的是:
数据流程图(DFD图)是
StressManagement1.DefinitionofstressResponseofthebodyto【T1】stimuliorstressors【T1】______Perceptibleeffects:increas
最新回复
(
0
)