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、A thrilling exploration in the desert. B、How GPS saved the survivors. C、What is GPS and how it works. D、The danger of space ex
A、A thrilling exploration in the desert. B、How GPS saved the survivors. C、What is GPS and how it works. D、The danger of space ex
admin
2018-05-10
70
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. 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[24]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. 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 is true about the trip made by the young people?
23. What is the main topic of the passage?
24. Which of the following is true about the GPS?
25. What must be determined first before the GPS receiver can calculate other information?
选项
A、A thrilling exploration in the desert.
B、How GPS saved the survivors.
C、What is GPS and how it works.
D、The danger of space exploration.
答案
C
解析
主旨题应该概括且含有核心词,符合此要求的是C,全篇大部分文字都是在介绍GPS及其功用。
转载请注明原文地址:https://www.kaotiyun.com/show/yG47777K
0
大学英语四级
相关试题推荐
HowAdvertisementIsDone?A)Whenwechooseawordwedomorethangiveinformation;wealsoexpressourfeelingsaboutwha
Forsomeeducators,thereisnothingwrongwithfunandgames.AgroupcalledtheEducationArcaderecentlyheldaconferencein
SevenWaystoCreateaHappyHouseholdA)Everyfamilyisdifferent,withdifferentpersonalities,customs,andwaysofthin
Afriendofmine,inresponsetoaconversationwewerehavingabouttheinjusticesoflife,askedmethequestion:"Whosaidli
Afriendofmine,inresponsetoaconversationwewerehavingabouttheinjusticesoflife,askedmethequestion:"Whosaidli
Forthispart,youareallowed30minutestowriteanessaycommentingonthesaying"Punctualityisoneofthecardinalbusine
A、Itenableschildrentolivebetter.B、Itgoesdownduringeconomicrecession.C、Itoftenriseshigherthaninflation.D、Ithas
Whenitcomestousingtechnologytopromoteeducation,theprevailingwisdomhasbeenthatmoreisbetter.Overthepastdecade
A、OutintheseaB、InsideabathhouseC、OnacliffalongthecoastD、OnthecoastoutsideJerusalemC信息明示题。由Ahugestormthatc
A、Thesmallbowlwasputabovethelargebowl.B、Thelargebowlwasputabovethesmallbowl.C、Thesmallbowlwasputinsideth
随机试题
石墨炉原子吸收法测定肉、蛋制品中的镉时,使用的基体改进剂为磷酸铵溶液。
呼吸链中的递氢体是呼吸链中以铁卟啉为辅基的单电子传递体是
依次填入文中横线处的语句,顺序恰当的一项是:“土豪”二字重点在“土”,重外在、喜奢华、好显摆,表达着一种与富裕的经济状况不相匹配的素质修养、行事风格以及外在气质。_________。_________。_________,_________是一种来自骨子
防护区的划分应根据封闭空间的结构特点和位置来划分,其中防护区围护结构及门窗的耐火极限均不宜低于()h。
会计人员如果泄露本单位的商业机密,可能导致的后果将会是()。
保险合同是()与保险人约定权利义务关系的协议。
职位评价主要是为了解决()。
以下为一位教师引导学生赏析《蝶恋花•答李淑一》的教学设计。《蝶恋花•答李淑一》这节课的具体环节是:一、导入:对比北方鼓词和南方弹词的特点,《蝶恋花•答李淑一》。二、听赏:1.介绍音乐背景、思考。2.音乐特点——《蝶恋花•答李淑一》是中华人民共和国后弹
某单位为了建设健全的公路桥梁养护管理档案,拟开发一套公路桥梁在线管理系统。在系统的需求分析与架构设计阶段,用户提出的需求、质量属性描述和架构特性如下:(a)系统用户分为高级管理员、数据管理员和数据维护员等三类;(b)系统应该具备完善的安全防护措施,能够
数据库设计的需求分析阶段,业务流程一般采用()表示。
最新回复
(
0
)