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
51
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
Thestudentswillputoffthematchuntilnextweek,______theywon’tbesobus
Directions:Anintroductorysentenceforabriefsummaryofthepassageisprovi
Whoweretakenhostageinthereportedkidnapping?[originaltext]Unidentifie
在对限制进入的工作场地的控制进行实地测试时,有两名员工向内部审计师反映某工序所用
口外弓推上颌磨牙向远中时,使用的牵引力每侧约A.300~500g B.200~
关于艾叶的使用方法,正确的是A.温经止血宜生用B.热盛血旺之出血证忌用C.男子忌
以下几种口服剂型其吸收从快到慢,顺序最为合理的是A.水溶液、胶囊剂、片剂、散剂、
饭店面对规模与影响范围很小、传播性不强、不触及其核心利益的舆情危机,可以采取(
根据《商业银行资本管理办法(试行)》的规定,对实施内部评级法的银行,内部评级法覆
根据物权法律制度的规定,依建设用地使用权用途的不同,娱乐用地使用权期限是(
最新回复
(
0
)