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
94
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.
The use of computers for specialized purposes depends on the ______.
选项
A、design of computer
B、power used to operate the computer
C、difficulty of the mathematical calculations involved
D、the ability of the programmer
答案
A
解析
文章第三段第一句话说到“Computerscan be designed for many specialized purposes-they can be used to prepare payrolls,guideairplane flights,direct traffic,even play chess.”可推知电脑可以被设计用于不同的目的,因此正确答案为A。
转载请注明原文地址:https://kaotiyun.com/show/ZNYC777K
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
Startedin1636,HarvardUniversityistheoldestofallthemanycollegesanduniversitiesintheUnitedStates.Yale,Princet
Ayoungwomanrodewithhernewhusbandinawagon(四轮马车).Theycametoalogcabin(小棚屋).Themallshoutedandalittleboycame
Ayoungwomanrodewithhernewhusbandinawagon(四轮马车).Theycametoalogcabin(小棚屋).Themallshoutedandalittleboycame
Youngpeoplewhodrinkorusedrugsaremainlyinfluencedbyboththeirparentsandpeerpressure.Otherreasonstheytaket
IntheUnitedStatesthemostpopularformoffolkdancingsincetheearlydayshasbeensquaredancing.Inearlytimes,whenme
Infact,therewashardlyanyactivityorsocialeventthatcouldnotbesettoMusic.Weddings,births,christening,funerals,
Therearenoinevitableoutcomesofsocialclassinchildrearing.Atthesametime,thereisnoquestionthatsocialclassisi
November7,2000isaveryspecialdayintheUnitedStates.Votersallacrossthenationare【21】representativesinlocalandna
Asoneapproachessomecrossroads,onecomestoasignwhichsaysthatdrivershavetostopwhentheycometothemainroadahea
随机试题
A.马拉硫磷B.非泼罗尼C.环丙氯嗪D.常山酮E.三氮脒治疗放牧黄牛牛皮蝇蛆感染的药物是
功能解毒、截疟的药物是
混凝土强度试验所需设备包括()。
某城镇污水处理厂日生成剩余污泥2350m3,污泥含水率99.5%,拟采用连续流重力浓缩池对污泥进行浓缩处理,浓缩池的污泥固体负荷45kg/(m2.d),适合的水力负荷范围是0.2~0.4m3/(m2.h),污泥浓缩后的含水率降为97%,假设污泥密度为1g/
下列选项中,关于噪声监测布点原则说法正确的是()。
李某2012年5月份收入情况如下:(1)取得劳务报酬收入20000元;(2)取得股息收入1000元;国库券利息收入200元;(3)取得稿酬收入5000元;(4)取得特许权使用费收入10000元,并将其中的5000元通
张先生2009年6月份销售一套普通住房取得销售收入120万元。该住房系张先生于2008年12月份购买取得,取得的购房发票上注明的房屋价款为90万元。张先生销售住房应缴纳的营业税为()。
注意有哪些功能?试举一个或几个日常生活中的例子来说明。
以下几位哪一位是永恒主义的代表人物?()
以下论述正确的是( )。
最新回复
(
0
)