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
专升本
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
2015-10-30
49
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 run 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 play chess. Computers play an essential role in modern automation in many plants and factories throughout the world.
A computer is a machine designed to______.
选项
A、perform work mathematically
B、perform complicated calculations
C、store and select information
D、all of the above
答案
D
解析
由文章第一段第一句“A computer is amachine designed to perform work mathematicallyand to store and select information that has beenfed into it.”及后面的“These machines can do agreat deal of complicated work in a very shorttime.”可知D项正确。
转载请注明原文地址:https://kaotiyun.com/show/ONYC777K
本试题收录于:
英语题库成考专升本分类
0
英语
成考专升本
相关试题推荐
ManypeoplebelievethatAmericanslovetheircarsalmostmorethananythingelse.Theyare【21】aboutcars.Notonlyisthecart
It’sanannualback-to-schoolroutine.Onemorningyouwavegoodbye,andthat【21】eveningyou’reburningthemid-nightoilinsym
Ayoungwomanrodewithhernewhusbandinawagon(四轮马车).Theycametoalogcabin(小棚屋).Themallshoutedandalittleboycame
Vitaminsareorganiccompoundsnecessaryinsmallamountsinthedietforthenormalgrowthandmaintenanceoflifeofanimals,
Lastyear,myclassmateJaneandIgraduatedfromanordinarynormaluniversity.Likemostofthestudentswhohadjuststepped
Tousitseemssonaturaltoputupanumbrellatokeepthewateroffwhenitrains,butactuallytheumbrellawasnotinvented
Howcanwegetridofgarbage?Dowehaveenoughenergysourcestomeetourfutureenergyneeds?Thesearetwoimportantque
TherePicturesfromouterspacenowshowushowmuchlandhaschangedonearth.TheseimagesaretakenbyLandsat7,agovernmen
Manypeoplearewonderingifitissafetotalkonthephonewhiledriving.Therehavebeenquiteafewaccidentswhiledrivers
Eachofthestudentsinourclass______greatinterestinEnglishandtheyeach______acopyofANewEnglish-ChineseDictionary.
随机试题
对总体未做任何分组,仅罗列各单位名称或按时间顺序排列的表格叫()
患儿,6岁。右下第一恒磨牙深龋洞,去尽腐质,近髓,无任何症状,处理首选
长期使用利尿药的降压机制是
财政机制在城市规划实施中有重要地位的表现为:
《公司法》规定股份有限公司在任何情况下不得收购本公司股票。( )
马克思主义认为,实现人的全面发展的根本途径是()
若平面内有10条直线,其中任何两条不平行,且任何三条不共点(即不相交于一点),则这10条直线将平面分成了()部分.
下列会议中,明确制定了抗日救国十大纲领,强调要打倒日本帝国主义,关键在于使已经发动的抗战成为全面的全民族的抗战;强调必须坚持统一战线中无产阶级的领导权,在敌人后方放手发动独立自主的山地游击战争,在国民党统治区放手发动抗日群众运动的是()
中泮人民共和国的成立,标志着我国新民主主义革命阶段的基本结束和社会主义革命阶段的开始。我国社会进入了由新民主主义到社会主义的过渡时期。这一时期,我国社会的性质是()
A、Atlunch.B、Attheoffice.C、Inclass.D、Athome.C
最新回复
(
0
)