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
2017-10-31
50
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 [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. [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 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://kaotiyun.com/show/qoa7777K
0
大学英语四级
相关试题推荐
Noteverybodyreadsthe【B1】_____newspaper.Peoplewhodonotreadnewspapersaresometimes【B2】_____asnon-readers.Earlyresear
A、TheyareunfriendlytoGypsies.B、TheyadmirethemusicaltalentoftheGypsies.C、TheyareenviousofGypsies.D、Theytryto
A、Awaitress.B、Acashier.C、Asecurity.D、Asecretary.A男士向女士要一份伏特加酒和橙汁,女士把东西给了他并收取费用。因此,女士应当是服务员,本题选A。
Byandlarge,marriedpeopleappeartohavebetterhealththantheirsinglepeers.However,ifthemarriageends,thathealthye
A、Themanisnotsatisfiedwithhisjob.B、Themangetsalongwellwithhisgirlfriend.C、Themanhasnothingtodosofar.D、Th
AlthoughtheOlympicCharter,theofficialconstitutionoftheOlympicmovement,proclaimsthattheOlympicsarecontestsamong
SchoolsoutsidecitiesA)Withitssandybeaches,charmingruinsandoccasionallybluewaters,theIsleofWightisaperfectspo
A、Shewilldeliveraspeechattheconvention.B、Sheistheonlyrepresentativeofherdivision.C、Shehelpstobuildamarketin
Carsandotherroadvehiclesarethesinglemainsourceofharmfulnitrogenoxides.Roadtransportremainsthebiggestsourc
A、Hehastopickuphistoolkits.B、Hehastotakeabushome.C、Hehastoopenhisstoreinthemorning.D、Hehastopickuph
随机试题
时间艺术:______、_______。
右心衰竭引起淤血的器官主要是
病案整理过程包括资料的装订,病案装订的方式是
1989年,某国家儿童中发生了艾滋病病毒感染的暴发流行,经调查,可能的原因是
清热利湿而利胆退黄,为治湿热黄疸之要药的中药是
一平面简谐波的波动方程为y=0.1cos(3πt—πx+π)(SI),t=0时的波形曲线如图所示,则下列叙述中哪个正确?
某施工企业2015年度利润表中营业利润为1000万元,营业外收入200万元,营业外支出100万元,适用所得税率25%,则当期所得税为()。
绩效的卓越标准是指企业未做要求和期望,其作用是()。
下列关于投资性房地产转换的会计处理,表述正确的是()。
在学生表中共有100条记录,执行如下命令,执行结果将是INDEXON-总分TOZFSETINDEXTOZFGOTOPDISPLAY
最新回复
(
0
)