首页
登录
职称英语
[originaltext] For three groups of explorers formed by college students and
[originaltext] For three groups of explorers formed by college students and
游客
2024-01-27
56
管理
问题
For three groups of explorers formed by college students and young white collars, it started out as a wonderful trip. They were enjoying themselves exploring the Inner Mongolian desert.[22]But when the sandstorm came, the trip became a disaster.
The drama unfolded during the May Day holiday. One girl did not make it before the students were rescued. The group was eventually found with the help of a GPS receiver.
GPS, or global positioning system, is a satellite-based navigation system made up of a network of 24 satellites. It was originally created for military use by the US in 1980s but is now available for civilian use. GPS works in any weather conditions, anywhere in the world, 24 hours a day. And the service is free.
GPS satellites circle the earth twice a day and transmit signals and information to the earth. GPS receivers take this information and calculate the user’s exact location. A GPS receiver must be locked on to the signals of at least three satellites to calculate the latitude and longitude of its location. With four or more satellites in view, the receiver can determine the user’s altitude.[25]Once the user’s position has been determined, the GPS receiver can calculate other information, such as speed, direction, distance to destination, and a whole lot more.
22. What do we learn about the trip made by the young people?
23. What is the main topic of the passage?
24. What does the speaker say about the GPS?
25. What must be determined first before the GPS receiver can calculate other information?
选项
A、The user’s position.
B、The speed of the satellites.
C、The distance to destination.
D、The information to the earth.
答案
A
解析
根据录音最后一句“一旦确定了使用者的位置,全球定位系统接收器就能计算其他的信息,如……”,可知A正确。
转载请注明原文地址:http://tihaiku.com/zcyy/3400055.html
相关试题推荐
[originaltext][23]Manydeathsfromhomefiresaretheresultofburnsandpani
[originaltext]Thetwentiethcenturyhasbroughtwithitmanyadvances.(7)W
[originaltext]Thetwentiethcenturyhasbroughtwithitmanyadvances.(7)W
[originaltext][22]Mr.Stevensonwastheownerofageneralappliancestore
[originaltext][22]Mr.Stevensonwastheownerofageneralappliancestore
[originaltext][16]Areyoulookingforagoodrelationshipwithsomeonespe
[originaltext][16]Areyoulookingforagoodrelationshipwithsomeonespe
[originaltext]CharlieParkerisoneofAmerica’sgreatestjazzmusicians.H
[originaltext]CharlieParkerisoneofAmerica’sgreatestjazzmusicians.H
[originaltext]CharlieParkerisoneofAmerica’sgreatestjazzmusicians.H
随机试题
—Hello,thisistheadmissionsoffice.CanIhelpyou?—Hi.I’mcallingaboutyo
You’dbettertakeasweaterwithyou______(以防天气变冷).incase/lestitturnscold本
消防电话系统保养方法有()。A.用吸尘器、清洁的干软布等清除机壳表面及所有接线端
图示四根细长压杆的抗弯刚度EI相同,临界载荷最大的是( )。 A.图(A)
下列关于混凝土和易性的描述错误的是( )。A.包括流动性、黏聚性和保水性 B
下列各项中,关于肺癌的中医病机叙述,错误的是()A.病变部位在肺 B
药材玄参横断面的特征为A.黄色,颗粒性B.白色,纤维性C.白色,粉性D.黑色,角
Thechangeinthatvillagewasmiraculou
保险利益消失,保险合同随之失效。( )
根据《建筑工程建筑面积计算规范》GB/T50353-2013,建筑物架空层的建筑
最新回复
(
0
)