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
61
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
SeismologistsstudyingtheearthquakethatstucknorthernCaliforniainOctober
Mostpeoplewishtheyhadbettermemoriesandworryaboutforgettingthings
【B1】[br]【B7】[originaltext]Ifyouarelikemostpeople,you’veindulgedin
某模块内涉及多个功能,这些功能必须以特定的次序执行,则该模块的内聚类型为( )
垂体兴奋试验用于鉴别:()A.丘脑性与垂体性闭经 B.卵巢性与垂体
化工生产的条件和环境较为苛刻,不同的生产工艺对于压力、温度的要求不尽相同。下列关
352,693,716,413,()A.402 B.514 C.73
有的小学生为了得到老师的鼓励而努力学习,有的小学生为了得到家长的鼓励而努力学习,
企业发行注册短期融资券,()委员认为企业没有真实、准确、完整、及时地披露信息,
在专家判断法中,“5C”要素分析法长期以来得到广泛应用。“5C”指的是()。A
最新回复
(
0
)