首页
登录
职称英语
[originaltext] GPS stands for the Global Positioning System. It refers to a
[originaltext] GPS stands for the Global Positioning System. It refers to a
游客
2024-02-07
60
管理
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. 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. 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. 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.
16. According to the passage, what is the most important part of the global positioning system?
17. Which aspect of the GPS is emphasized by the speaker?
18. 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://tihaiku.com/zcyy/3430977.html
相关试题推荐
[originaltext]Thecomputervirusisanoutcomeofthecomputerovergrowthi
[originaltext]WeddingsintheUnitedStatesvaryasmuchasthepeopledo.
[originaltext]Whenyouturnontheradio,youhearanadvertisement.Wheny
[originaltext]Whenyouturnontheradio,youhearanadvertisement.Wheny
[originaltext]W:Well,John,howwasyourvacation?Didyouvisitalltheplace
[originaltext]M:Hi,Iamgoingdoortodoortonighttotellpeopleaboutthes
[originaltext]M:Hi,Iamgoingdoortodoortonighttotellpeopleaboutthes
[originaltext]M:Hi,Iamgoingdoortodoortonighttotellpeopleaboutthes
[originaltext]W:Ineedacarthisweekend,butminehasbrokendown.M:I’ms
[originaltext]W:Ineedacarthisweekend,butminehasbrokendown.M:I’ms
随机试题
Thegoals______hehadfoughtallhislifenolongerseemedimportanttohim.A、
ThroughoutGeorgeBush’spresidency,thefederalgovernmenthasrefusedtosu
Questions1-4Thetexthas9paragraphs(A-I).Whichparagraphcontainseachof
茶是中国人的一种特殊饮料,在中国人的日常生活中占有重要的地位。作为世界茶叶主要出产国之一,中国的茶叶种类繁多,具有代表性的有绿茶、红茶、乌龙茶(oolo
什么是农业产业化龙头企业?
沿面放电电压、与同样距离下的纯空气间隙的放电电压相比总是()。A.高 B.低
属于活性亚甲基试剂的是A.三氯化铁--浓硫酸试剂B.对二甲氨基苯甲醛试剂C.五氯
保险人知道保险代理人的行为违法时,不做反对表示,由()承担责任。A.保险代理人
银行承兑汇票的承兑银行,应当按照票面金额向出票人收取()的手续费。A:千分之一
关于民用建筑工程室内环境中污染物浓度检测的说法,错误的是( )。A.甲醛、苯、
最新回复
(
0
)