首页
登录
职称英语
[originaltext] People in most countries depend on communications technology
[originaltext] People in most countries depend on communications technology
游客
2024-03-01
63
管理
问题
People in most countries depend on communications technology more than ever before. One day in May, an accident forced millions of Americans to be silent. They had to live and work without the technology they depend on every day.
A telecommunication satellite experienced computer failure. The satellite, known as Galaxy Four, moved from its correct orbit and was unable to receive signals from Earth. A backup computer failed to turn on, and the satellite began to spin out of control.
Galaxy Four was launched in 1993. It cost two hundred fifty million dollars. Galaxy Four provided the major link for millions of pagers, credit card operations, company communications systems, and home satellite equipment. The satellite also was used to send television and radio broadcasts.
The telecommunication satellite failure created big problems for many companies. At least eight of the nation’s ten biggest paging companies depend on Galaxy Four. A pager is an electronic device that receives telephone messages. The pager makes a beeping sound when it receives one. Ninety percent of the nation’s forty-five million pagers lost service when Galaxy Four failed. Paging companies were unable to provide services to police department, doctors and other individuals.
The satellite failure affected many television and radio broadcasts. Thousands of computer users were unable to use the Internet.
A nearby satellite called Galaxy Six has replaced the Galaxy Four satellite. Signals for broadcasting companies are being sent through Galaxy Six. Another satellite, Galaxy Three-R, is replacing Galaxy Four for paging and other signals. Technical experts had to move each person’s satellite equipment to point to Galaxy Three-R. Each move takes about thirty minutes. Technicians say the moves must be exact to within less than a centimeter. They were able to restore service to most customers within a few days.
选项
A、Paging companies.
B、Television and radio broadcasts.
C、Computer users.
D、Household equipment.
答案
A
解析
转载请注明原文地址:http://tihaiku.com/zcyy/3495546.html
相关试题推荐
【B1】[br]【B6】[originaltext]RecentlyagroupofSwedishresearchscientists
【B1】[br]【B4】[originaltext]RecentlyagroupofSwedishresearchscientists
【B1】[br]【B2】[originaltext]RecentlyagroupofSwedishresearchscientists
[originaltext]Scientistsinmanydevelopingnationsarestudyingawaytop
[originaltext]Mostantsarehardworkersandoftenworkfromsixinthemor
[originaltext]Mostantsarehardworkersandoftenworkfromsixinthemor
[originaltext]Mostantsarehardworkersandoftenworkfromsixinthemor
[originaltext](Aftersittingandreadingthemenu)W:Goodafternoon.Whatcan
Dependingonwhatyouarelookingfor,youhavetojudgeforyourself______(这些资
【S1】[br]【S9】A空格中需要填入副词修饰depend,将选择范围缩小到heavily和slightly上。而最后一段指出多数报纸的主要收入来源(ma
随机试题
[img]2011q1/ct_epem_epelist_0080_201121[/img][br][originaltext]Intheforest,
ProfessorSmithissaid______anotherimportantdiscoveryinchemistry.A、tomake
镇痛药起效迅速,但病人血药浓度波动大的给药方式是()A.硬膜外给药 B.
关于肠外营养液的成分下列叙述正确的是:()A.应每天常规给予水溶性、脂溶
证券公司不得为客户开立信用业务账户的情形有()。 ①.未按照要求提供有关
机械制造企业所进行的产品工艺设计活动属于()。A.生产技术准备过程
湿热阻窍型鼻渊在基本处方的基础上再配( ) A.少商 B.曲池 C.阴陵
Question61-63refertothefollowingem
已知某企业生产销售甲乙两种产品,2010年销售量分别为20万件和30万件,单价分
某220kV变电站的火灾自动报警系统,采用共用接地装置,其接地电阻不应大于()
最新回复
(
0
)