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
2024-02-18
31
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. (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, (27) 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、The accuracy of GPS system.
B、The cost of GPS devices.
C、The weight of GPS devices.
D、The speed of information transmission.
答案
A
解析
题干询问作者强调了全球定位系统的哪个方面。短文多次提到了系统的准确性:由于技术提高,价格降低,准确性同时增强;便携式准确性惊人;地面辅助设备增加准确性,故答案为A)。
转载请注明原文地址:https://tihaiku.com/zcyy/3460436.html
相关试题推荐
[originaltext]OnWednesday,PresidentObamasignedintolawtheWallStreet
[originaltext]OnWednesday,PresidentObamasignedintolawtheWallStreet
[originaltext]SomeyoungengineersfromtheUnitedStateshavebroughtthe
[originaltext]Agovernmentreportsaysclimatechangeisalreadyaffecting
[originaltext]Agovernmentreportsaysclimatechangeisalreadyaffecting
[originaltext]Agovernmentreportsaysclimatechangeisalreadyaffecting
[originaltext]M:MissLynn,isn’tit?Well,nowletmesee.You’reagraduateo
[originaltext]W:HowwasyourtriptoLondon?You’vebeentoBritainbefore,ha
[originaltext]W:HowwasyourtriptoLondon?You’vebeentoBritainbefore,ha
[originaltext]W:HowwasyourtriptoLondon?You’vebeentoBritainbefore,ha
随机试题
WhathappenedinLondonafewmonthsago?[br][originaltext]Afewmonths
A.forgeB.tracesC.privateD.fearE.puzzlesF.helpfulG.createsH
[originaltext]Mostpeoplefeellonelysometimes.Butitusuallyonlylasts
[originaltext]W:Hi.Howcanwehelpyoutoday?M:Yeah.I’dliketogetmyhai
[originaltext]M:IwassurprisedtoseeKateusingthatmicrophoneyouweregoi
心源性哮喘宜选用()A:多巴胺 B:哌替啶 C:肾上腺素 D:去甲肾上腺
患者,女,29岁,已婚。自然流产后5年,近3年一直未孕,月经稀发,量少,偶有闭经
白细胞直方图淋巴细胞峰右移,与单个核细胞峰左侧相连并抬高,最可能的原因是A.有核
贯彻“为了每一位学生的发展”的新课程教育理念,首先应该做到的是()。A.满足
非蛋白呼吸商是指 A.一定时间内糖和脂肪氧化时产生的CO2量与耗氧量的比值
最新回复
(
0
)