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
外语
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
2013-10-17
30
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 to play chess. Computers play an essential role in modern automation in many plants and factories throughout the world.
The passage says that computer plays an essential part in______.
选项
A、traffic control
B、mathematical computations
C、the development of mathematical theory
D、automation processes
答案
D
解析
文中最后一段最后一句说:“计算机在世界上许多大小工厂的自动化中充当了关键的角色。”由此可判定选项D正确。
转载请注明原文地址:https://kaotiyun.com/show/RNXO777K
0
在职攻硕英语联考
相关试题推荐
Aperson’shomeisasmuchareflectionofhispersonalityastheclotheshewears,thefoodheeatsandthefriendswithwhomh
Mostpeoplewhotravellongdistancescomplainofjetlag(飞行时差反应).Jetlagmakesbusinesstravelerslessproductiveandmorepro
Asthetwentiethcenturybegan,theimportanceofformaleducationintheUnitedStatesincreased.Thefrontierhadmostlydisap
By1830theformerSpanishandPortuguesecolonieshadbecomeindependentnations.Theroughly20million【C1】______ofthesenati
By1830theformerSpanishandPortuguesecolonieshadbecomeindependentnations.Theroughly20million【C1】______ofthesenati
Comparisonsweredrawnbetweenthedevelopmentoftelevisioninthe20thcenturyandthediffusionofprintinginthe15thand
Comparisonsweredrawnbetweenthedevelopmentoftelevisioninthe20thcenturyandthediffusionofprintinginthe15thand
Criticismandself-criticismisnecessary______ithelpsustofindandcorrectourmistakes.
Foryears,studieshavefoundthatfirst-generationcollegestudents—thosewhodonothaveaparentwithacollegedegree—lagot
Between1833and1837,thepublishersofa"pennypress"provedthatalow-pricedpaper,editedtointerestordinarypeople,cou
随机试题
患者,女性,68岁。因乳腺癌住院化疗,为其输液过程中,患者出现呼吸困难,听诊心前区有响亮的“水泡音",患者可能发生空气栓塞,空气栓塞的部位是在
下列各组腧穴中,属于足厥阴肝经起、止穴的是
慢性支气管炎患者偶有轻微咳嗽,少量痰液,采取下列哪项措施最为合适
疫情报告是传染病管理的重要组成部分,也是有关机构及人员的法定职责和义务,法定疫情责任人报告人是指执行职务的( )
机体各种功能活动所消耗的能量中,最终不能转化为体热的是
需要采取“甲类传染病的预防”控制措施的疾病不包括
某企业制造费用中的电力费用与机器人工密切相关,机器设备的正常生产能力为1000万小时,此时也为最大生产能力。当生产能力利用程度为70%时,电力费用总额为1200万元,每月的固定电力费用500万元,则下列说法正确的有()。
在我国,有关法定继承人的顺序,错误的说法是()。
为防止氧气中毒,潜水员在水中携带的气瓶中存放的不是氧气,而是压缩空气,但即使如此,下潜深度过大,潜水员依然会出现类似醉酒的情形,行动力、判断力均受很大影响,其原因是()。
已知三阶矩阵A的第一行是(a,b,c),a,b,c不全为零,矩阵B=(k为常数),且AB=0,求线性方程组Ax=0的通解。
最新回复
(
0
)