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
2017-09-04
45
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 a machine designed to perform work mathematically and to store and select information that has been fed into it.”及后面的“These machines can do a great deal of complicated work in a very short time.”可知D项正确。
转载请注明原文地址:https://kaotiyun.com/show/JYiC777K
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
Workingonanewspaperisaverybusyjob.Manynewspapers【21】eachday,andtheyhaveto【22】peoplewithallthelatestnews.The
Workingonanewspaperisaverybusyjob.Manynewspapers【21】eachday,andtheyhaveto【22】peoplewithallthelatestnews.The
Nowadaysmostpeopledecidequite【61】whatkindofworktheywoulddo.WhenIwasatschool,wehadtochoose【62】whenwewerefif
Nowadaysmostpeopledecidequite【61】whatkindofworktheywoulddo.WhenIwasatschool,wehadtochoose【62】whenwewerefif
Pickouttheappropriateexpressionsfromtheeightchoicesbelowandcompetethefollowingdialoguesbyblackeningthecorrespo
Allthatwereallyneedtoplotoutthefutureofouruniverseareafewgoodmeasurements.Thisdoesnotmeanthatwecansitd
Ifeelsurethat______qualification,abilityandexperience,youareabundantlysuitedtothepositionwehaveinmind.
Alawyerfriendofminehasdevotedherselftotheserviceofhumanity.Herspecialareaiscalled"publicinterestlaw".Ma
I’veworkedheresinceI______HarvardBusinessSchool.
Animportantbusinessmanwasaskedtogiveatwenty-minutespeechinanothercity.Hewastoobusytowriteithimself,soheas
随机试题
双重绝缘是兼有()的绝缘。
西非大片地区无间日疟,部分居住在美国或其他地区的黑人对间日疟不敏感,推测有关的原因是他们
A.无菌创口B.污染创口C.感染创口D.一期愈合创口E.延期愈合创口与口鼻腔相通或在口腔内手术的创口属于()
半机械化吊装方法中,一种吊装方法是将直立的桅杆与放在地面上的设备连接起来,然后桅杆旋转90°,由垂直位置变为水平位置,而设备则由水平位置变成垂直位置,此种吊装方法为()。
在进行基金产品风险评价时,应当依据的因素不包括()。
教师在职业生活中,调节和处理与他人、与社会、与集体、与职业工作关系所应遵守的基本行为规范和行为准则,以及在此基础上所表现出来的观念意识和行为品质叫作()。
德国古典哲学的主要代表人物是()。
从所给的四个选项中,选择最合适的一个填入问号处,使之呈现一定的规律性:
“地球一小时”是WWF为应对全球气候变化所发起的一项可持续性全球活动,熄灯1小时的黑暗给人们带来的象征性危机,会加深人们节约能源、保护环境的意识,_______________,人们便自觉地在日常生活中_______________节约、环保理念。
Americans’circleofcloseconfidantshasshrunkdramaticallyinthepasttwodecadesbutthenumberofpeoplewhosaythey【M1】_
最新回复
(
0
)