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
2012-08-10
50
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. (26) 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. (27) 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. (28) 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.
26. According to the passage, what stands at the center of the global positioning system?
27. Which aspect of the GPS is emphasized by the speaker?
28. 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/zX57777K
0
大学英语四级
相关试题推荐
Veryfewpeoplecangetcollegedegreebefore11,butMichaelwasan【B1】______.Hestartedhighschoolwhenhewas5,finishing
A、Inalibrary.B、Inaschool.C、Inabookstore.D、Inapublishers’office.C推理题。第一题的答案往往在长对话的开始部分,根据首句的enjoygoingthroughsec
A、Becauseteacherscametothechildren’shomes.B、Becausechildrenacquiredtheinformationtheyneededbydirectexperience.C
Themodernworldcouldnotoperatewithoutroads.Itisawayoflifewithalmosteveryfamilyinthewesternworldowningan
Themodernworldcouldnotoperatewithoutroads.Itisawayoflifewithalmosteveryfamilyinthewesternworldowningan
Everyonewantstobehealthyandhappy.【C1】______,illnessoraccidentsmayoccurwithoutany【C2】______.Frequentlythepersonw
HowAdvertisementIsDoneThelanguageoftheadvertiserWhenwechooseawordwedomorethangiveinformation;wealsoexp
HowAdvertisementIsDoneThelanguageoftheadvertiserWhenwechooseawordwedomorethangiveinformation;wealsoexp
HowAdvertisementIsDoneThelanguageoftheadvertiserWhenwechooseawordwedomorethangiveinformation;wealsoexp
随机试题
免疫增强剂常用于:
有关膀胱结核的诊断要点,下列哪项错误
可标记McAb进行放射免疫治疗(RIT)的放射性核素是
治疗不稳定型心绞痛宜选用
小学班主任的职责与任务有哪些?
可以适用简易程序审理的案件是()。
男性,60岁,晚期肿瘤病人,死于全身广泛性转移。及时做尸体解剖时可发现心脏的病理变化是
FTP是因特网中()。
Thevillagers,______hadbeenwashedbytheflood,calledinpeople’said.
Electroniccomputers,whichhavemanyadvantages,cannotcarryoutcreativeworkandreplaceman.
最新回复
(
0
)