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
2023-07-17
63
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/2844172.html
相关试题推荐
[originaltext]Asanyhomemakerwhohastriedtokeeporderatthedinnerta
[originaltext]Whenitcomestofindingajob,whoyouknowisasimportant
[originaltext]Whenitcomestofindingajob,whoyouknowisasimportant
[originaltext]M:Soyouareatranslator?W:No,I’maninterpreter.M:What’s
[originaltext]M:Soyouareatranslator?W:No,I’maninterpreter.M:What’s
[originaltext]M:Soyouareatranslator?W:No,I’maninterpreter.M:What’s
[originaltext]W:John,youlookterrific.Areyouworkingoutrecently?Yousur
[originaltext]W:John,youlookterrific.Areyouworkingoutrecently?Yousur
[originaltext]M:Ijuststoppedbyyourofficeinthebank.Theytoldmethaty
[originaltext]M:Ijuststoppedbyyourofficeinthebank.Theytoldmethaty
随机试题
Britainisfacinga【C1】______riseinitsratpopulation【C2】______grow
WriteonANSWERSHEETTWOanoteofabout50—60wordsbasedonthefollowin
[originaltext]M:Didyoureallygiveawayallyourfurniturewhenyoumovedint
1wasonthepointofgoingtobed Mr.Zh
下列的临床表现中,多见于溃疡性肠结核的是()。A.便秘 B.糊样便 C.鲜
A.胸痛、咳铁锈色痰 B.肝、脾肿大及腹水 C.排虫史 D.皮下结节 E
C
下列绘画作品中与其他三幅出自不同朝代的是()。A.《步辇图》 B.《江帆楼阁图
(2016年真题)芝加哥商业交易所3个月期欧洲美元期货的成交价为33.58,其含
某重要水源涵养区60%的面积位于甲省、40%的面积位于相邻的乙省。按照《全国生态
最新回复
(
0
)