首页
登录
职称英语
A computer is a machine designed to perform work mathematically and to stor
A computer is a machine designed to perform work mathematically and to stor
游客
2023-11-23
27
管理
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. [br] 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
见文章第1句:A computer is a machine designed to perform work mathematically and to store and select in formation that has been fed into it计算机是一种可进行数学运算的机器,它还能储存和选择已输入的信息。包括了A、B、C三项的内容。故选项D正确。
转载请注明原文地址:https://tihaiku.com/zcyy/3211313.html
相关试题推荐
Goingoncomputermaybethetoughestjobaremodelingcontractoreverdoes
Asa______actor,hecanperform,sing,danceandplayseveralkindsofmusical
MillionsofAmericansruntothebankorvisitautomatedtellermachineswhen
MillionsofAmericansruntothebankorvisitautomatedtellermachineswhen
MillionsofAmericansruntothebankorvisitautomatedtellermachineswhen
MillionsofAmericansruntothebankorvisitautomatedtellermachineswhen
TheCompetitionamongproducersofpersonalcomputersisessentiallyarace
TheCompetitionamongproducersofpersonalcomputersisessentiallyarace
Try______thegreenbuttontoseeifthemachinewillstart.A、pressB、topress
Afterperformingasuccessfuloperation,thedoctoratlastpulledthepatient__
随机试题
[originaltext]Intheearliesttimes,theonlypowerthatmanhadformaking
[originaltext]Thefirststeptostopdrugabuseisknowingwhypeoplestart
A.providesB.duetoC.constructionD.servingE.ascendingF.enterpr
曲线:与直线围成一个平面图形。此平面图形绕x轴旋转产生的旋转体的体积是:
患者,女性,20岁,临床诊断为缺铁性贫血。实验室检查结果与诊断不符的是A.MCH
护士的标准预防护理措施中不包括()。A.洗手 B.戴口罩 C.戴手套 D.
将保障校园食品安全列为“硬任务” 2019年,校园食物中毒事故要控制在万分
某资产管理机构发行了—款具有保本结构的权益类结构化产品,该产品的主要条款如表所示
申请设立期货公司,股东应当以货币或者期货公司经营必需的非货币财产出资,货币出资比
案例七: 一般资料:求助者,女性,36岁,部门经理。 案例介绍:求助者5岁时
最新回复
(
0
)