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
11
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、The Origins of GPS
B、The Advantages of GPS
C、The Future of GPS
D、The Increasing Uses of GPS: Military and Civilian
答案
D
解析
掌握反映全文结构脉络的信号词,有助于判断全文主旨。本文中第二段首however的使用就反映文章的结构走向。
转载请注明原文地址:https://tihaiku.com/zcyy/3302878.html
相关试题推荐
Bullettrainswerefloodedinamountainousarea.[originaltext]TyphoonHagi
Librariesformavitalpartoftheworld’ssystemsofcommunicationandeduc
TheElectronMicroscopeThegenerallayoutoftheilluminationsystemand
Thishigh-speedrailsystemisnotsomefanciful,pie-in-the-skyvisionofthef
TheBritishEducationalSystemAllovertheworldmentionofEnglisheduca
AninternalbriefingdocumentseenbytheBBCsaystheeffectsofglobalisati
目前,中国的烟草和烟制品的生产和消费占世界第一,因吸烟造成疾病的死亡率也占世界第一。Currently,Chinahasbecometheworld’
它引发了全球对埃及学的狂热兴趣,成为了埃及旅游业的基石。(setoff)ItsetoffaglobalfascinationwithEgypto
AninternalbriefingdocumentseenbytheBBCsaystheeffectsofglobalisat
CindyShermanisastrangelyelusiveartist.Herfacehasbecomefamousthro
随机试题
[originaltext](I—Interviewer;B—Mrs.Bruce)I:I’mgoingtotalktoyouno
()产品设计()技术转让[br]()认证体系()使用年限N、J
加尔文的“预定论”否定了人的主观能动性。()
王某与周某结婚时签订书面协议,约定婚后所得财产归各自所有。周某婚后即辞去工作在家
机构投资者不可以采用的资产管理方式是( )。A.内部管理 B.外部管理 C
在我国建立新的运价形成机制,需要解决的问题有()。A.明确运价形成的基础 B
某建筑物地基基础设计等级为乙级,其柱下桩基采用预应力高强度混凝土管桩(PHC桩)
关于中药饮片鸦胆子不良反应表现及机制的说法,错误的是A.内服可引起患者胃肠道充血
以气体作为灭火介质的灭火系统称为气体灭火系统。气体灭火系统的使用范围是由气体灭火
下列施工费用中,可直接计入直接成本的有()。A.周转材料购置费 B.管理人员
最新回复
(
0
)