首页
登录
职称英语
[originaltext] The Global Positioning System (GPS) has become indispensable
[originaltext] The Global Positioning System (GPS) has become indispensable
游客
2023-12-25
47
管理
问题
The Global Positioning System (GPS) has become indispensable for soldiers, pilots, hikers, yachtsmen, even bankers, ever since the U.S. Department of Defense started filling the sky with satellites about 25 years ago, in order to improve navigation for fighters, bombers and warships. More recently, GPS has allowed the development of precision-guided weapons, the smart bombs that home in on targets: between Serbia four years ago and this year’s Iraq war, the proportion of such bombs used rose from no more than 3 percent to at least 60 percent.
However, the GPS is also an essential prop to countless civil applications; for every military user, there are now 100 civilian users. It provides not only satellite-navigator systems in cars and boats; it is used by Internet service providers, by banks and by surveyors. One day it might be used by air traffic control systems to permit "free flight", in which pilots of commercial aircraft find their own route and stay clear of other aircraft, without the cumbersome business of radio telephone contact with controllers on the ground.
选项
A、To improve navigation for warplanes and warships.
B、To guide smart bombs that home in on moving targets.
C、To collect meteorological data.
D、To sense remote volcanic eruptions.
答案
A
解析
原文第一段中说美国发射卫星的目的是“in order to improve navigation for fighters, bombers and warships”即“为战斗机、轰炸机和战舰导航”,由此可见,选项a的说法与原文相符,是正确答案。
转载请注明原文地址:https://tihaiku.com/zcyy/3303248.html
相关试题推荐
[originaltext]Ifyouliveinaplacewheremostpeoplespeakthelanguagey
[originaltext]America’sextremelywealthypopulationisbiggerthanever.A
BigcitiesintheUnitedStatesaregrowingliketheyusedto.[originaltext]
Thebuybackprogramistheresultofamassiveshooting.[originaltext]NewZ
Dogsunderstandthefeelingsoftheirowners.[originaltext]Whendogowners
Goodnutritionmaybekeytogettingpatients’healthback.[originaltext]Wh
[originaltext]Inwinter,peoplemightlessentheiroutdoorexercise.Theda
[originaltext]Whichismorepopular—coffeeortea?IfyouareonTeamC
Alargestudysuggeststhatthereisagenethatmakespeoplegay.[originaltext
Bullettrainswerefloodedinamountainousarea.[originaltext]TyphoonHagi
随机试题
Thereisnotmuchtochoosebetweenmen.Theyareallahotchpotchofgreatn
[originaltext]W:ThisisKerryBurkefromNewYorkDailyNews.(12/13)I’mspeaki
秘书在利用电话进行信息沟通时,若未经授权,则不能告知对方()。A.上司的家庭住
初产妇,40周妊娠,临产6小时,胎膜未破。宫缩间歇4~5分钟,持续30~40秒,
政府发行公债后,如果政府公债的购买者是企业或居民,那么会使社会的信用()。A:等
从一楼走到五楼,爬完一层休息30秒,一共要210秒,那么从一楼走到7楼,需要多少
关于税率的说法中,正确的是( )。A.比例税率是我国运用最广泛的一种税率形式
企业应当在职工实际发生缺勤的会计期间确认与非累积带薪缺勤相关的职工薪酬。()
下列风险分析工具中,风险概率估计的方法中属于定量分析的是()。A.风险结构
根据《建设项目安全设施“三同时”监督管理办法》,在建设项目进行可行性研究阶段,下
最新回复
(
0
)