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 computer is a machine designed to perform work mathematically and to store and select information that has been fed into it. I
A computer is a machine designed to perform work mathematically and to store and select information that has been fed into it. I
admin
2009-02-10
47
问题
A computer is a machine designed to perform work mathematically and to store and select information that has been fed into it. It is nm by either mechanical or electronic means. These machines can do a great deal of complicated work in a very short time. A large computer, for example, can add or subtract nine thousand times a second, multiply a thousand times a second, or divide five hundred times a second. Its percentage of error is about one in a billion digits. It has been estimated that human beings making calculations average about one mistake per two hundred digits.
The heart of an electronic computer lies in its vacuum tubes, or transistors. Its electronic circuits work a thousand times faster than the nerve cells in the human brain. A problem that might take a human being two years to solve can be solved by a computer in one minute, but in order to work properly, a computer must be given instructions--it must be programmed. Computers can be designed for many specialized purposes--they can be used to prepare payrolls, guide airplane flights, direct traffic, even to play chess. Computers play an essential role in modern automation in many plants and factories throughout the world.
The essential role played by computers lies in ______.
选项
A、automation processes
B、mathematical computations
C、traffic control
D、the development of mathematical theory
答案
A
解析
文章最后一句说:Computers play in essential role in modern automation in many plants and factories throughout the world.在全世界的许多工厂里,计算机在现代自动化程序方面起着必不可少的作用。所以选项A正确。
转载请注明原文地址:https://kaotiyun.com/show/zh6K777K
0
专业英语四级
相关试题推荐
Allsocialunitsdevelopaculture.Evenintwo-personrelationshipsaculturedevelopsintime.Infriendshipandromanticrela
ThroughouttheU.S.studentsaregettingouttheirNo.2pencils,readyendureastress-packedfourhoursofbubblinginanswers
TerrorismI.Whatisterrorism?A.【T1】______indifferentlights:atacticand【T1】______strategy,acrime,aholyduty,etc.
A、Searchingforinformation.B、Doingaliteraryresearch.C、Doingquestionnairesurvey.D、Narrowingdownthetopic.D细节题。选项A是查询资
Severalyearsago,webeganconstructiononanewchurchbuilding.Inthebeginning,theworkmendugabigpitintheground
Inrecentyears,itisnotuncommonthatacollegedegreecannotearnacollegegraduateadecentjobwhileskilledworkersfro
PASSAGETHREEWhydidpeoplelikeSarahgiveuppartoftheirindependencetolivewiththeirparents?
(1)Greeceisalandofruggedmountains,shadyolivetrees,morevarietiesofwildflowersmananyotherEuropeancountry,andis
(1)TheYouTubevideostartswiththeroadsign:Croxteth,CityofLiverpool.Ayouthracesamotorbikedownastreet,anotheren
随机试题
下列关于膀胱位置的叙述,正确的是()
金属导体的电阻R=U/I,因此可以说()。
乳突摄影体位与角度的组合,正确的是
男,30岁。低热、盗汗、咳嗽、血痰1个月。胸片示右上肺小片状浸润影,密度不均。确诊应选择的检查是
最初的生命可能就是一群偶然聚集在一起的有机物。之后,这群偶遇的有机物有了明确的分工。蛋白质负责提供支架和生产能量,DNA和RNA则保存和实施群体的“复制图纸”,磷脂分子和蛋白质还联手建了细胞膜。正是这层神奇的膜,将有机物集群包裹在一个稳定的环境中。生命的单
下面都属于指事字的是()。(北京语言大学2015)
AnExcitingNewWorldOpeningtoCivilianScientistsItishardtotrackthebluewhale,theocean’slargestcreature,which
Ihavenoalternativebuttoreporthimtothelocalpolice.
Whatisitthatbringsaboutsuchanintimateconnectionbetweenlanguageandthinking?Istherenothinkingwithouttheuseof
推荐我的是一位教授。
最新回复
(
0
)