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
80
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
本题要求把握全文结构脉络。本文主要内容是关于GPS(全球定位系统)的应用。其中,前一部分讨论了GPS在军事方面的应用;中间通过However实现转折,后一部分集中讨论GPS的民用。因此能够反映这种脉络,包含全文主要思想的选项d是正确答案。
转载请注明原文地址:https://tihaiku.com/zcyy/3303247.html
相关试题推荐
Itisobviousthattheagingsystemscontinueto______,andnonewreplacement
Withouteverhavingmadeanyeffort,somepeoplebecomerichovernight,makingb
Allinall,withoutglobalcooperation,anyeffortstohaveterrorismatbaywou
Votersrespondedtothelevyofanewtaxwith______becausetheyhavebecomeinu
Microbiomehelpsusbydigestingourfood,trainingourimmunesystemsandcr
Microbiomehelpsusbydigestingourfood,trainingourimmunesystemsandcr
Microbiomehelpsusbydigestingourfood,trainingourimmunesystemsandcr
Microbiomehelpsusbydigestingourfood,trainingourimmunesystemsandcr
Inresponsetotheneedsofachangingworld,therealmofeducationsystemhas
Asthephenomenonofblushingisrootedinthenervoussystem,whichthencauses
随机试题
Whentheyhadfinishedreading,thechildrenweretoldto________allthepicture
_____onlytenminutesearlierinthemorning,hewouldn’thavebeenlateforth
Onsomesailboats______atillerinsteadofawheelforsteering.A、havingB、inwh
26岁妇女,停经68日下腹痛及阴道多量流血已10小时。妇科检查:子宫稍大,宫口有
患儿男,5岁。因频繁发作性发呆1个月就诊,脑电图示全脑同步3Hz棘-慢复合波爆发
设备贷款必须提供担保,保证人是法人的,必须具备的条件不包括()。A.工商行政
有关纤溶酶(PL)的描述,不正确的是A:单链纤溶酶原(PLG)在t-PAu-PA
红外测温发现组合电器引线接头温度异常升高时,下面做法错误的是()发热部分
在ADR交易过程中,()负责ADR的注册和过户,安排ADR在存券信托公司的保管和
某男,80岁。久病,不耐寒热,头晕,神疲乏力,自汗盜汗;脉来沉细,应指无力,此脉
最新回复
(
0
)