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
2016-12-22
89
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 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://kaotiyun.com/show/DZY7777K
0
大学英语四级
相关试题推荐
CollegeRequiresFitnessAssessmentforFreshmenA)DuringtheirfirstsemesteratCokerCollege,studentsthisyearwilltakea
Businessesarestructuredindifferentwaystomeetdifferentneeds.The【B1】______formofbusinessiscalledanindividualorso
LiedetectorsarewidelyusedintheUnitedStatestofindoutwhetherapersonistellingthetruthornot.Polygraphers,thep
A、Aconcert.B、Anartmuseum.C、Aflowershop.D、Arestaurant.D推理题。四个选项都是名词,因此推测问题是问对话发生地点,听到关键词即可。音乐很动听,鲜花很美丽,男士又提到食物,可推测出地点是在
Doyoufindgettingupinthemorningsodifficultthatit’spainful?Thismightbecalledlaziness,butDr.Kleitmanhasanew
A、Atanewsstand.B、Atacardealer’s.C、Atapublishinghouse.D、Atanewspaperoffice.D推理题。男士想在报纸的周日版刊登二手车广告,女士建议他最好刊登一周,因为不能
A、Hedoesn’tthinkthatJohnisill.B、HeisawarethatJohnisill.C、HethinksthatperhapsJohnisnotinverygoodhealth.D
FixingaWorldThatFostersObesityA)WhyareAmericansgettingfatterandfatter?Thesimpleexplanationisthatweeattoomuc
20世纪前期最耀眼的京剧明星是四位男旦——梅兰芳、程砚秋、尚小云、荀慧生。他们用唱腔、眼神、动作将中国女性之美演绎到极致,达到了京剧表演艺术的高峰。据说男性扮演女性具有很多有利条件。首先,和女演员相比,男性的嗓音更有力度、厚度和广度,他们的一些唱
随机试题
审美实践活动发展中最基本的两种审美形态是【】
需18小时才能繁殖一代的细菌是
以下是某律师为客户提供的咨询意见,正确的是()
行政复议的特征包括()
下列交易或事项中,引起资产和负债同时增加的交易或事项是( )。
关于设立管理公开募集基金的基金管理公司应当具备的条件,下列选项中说法错误的是()。
(2005年考试真题)企业每期都应当重新确定存货的可变现净值,如果以前减记存货价值的影响因素已经消失,则减记的金额应当予以恢复,并在原已计提的存货跌价准备的金额内转回。()
甲公司采用随机模式确定最佳现金持有量,最优现金返回线水平为7000元,现金存量下限为2000元。公司财务人员的下列作法中,正确的有()。
方程组的通解是__________.
A、 B、 C、 B
最新回复
(
0
)