首页
登录
职称英语
[originaltext] A computer is a machine designed to perform work mathematical
[originaltext] A computer is a machine designed to perform work mathematical
游客
2023-07-16
44
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 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.
选项
A、Human beings make fewer errors.
B、Human beings do not have to be programmed.
C、Human beings work more quickly.
D、Human beings have to be programmed.
答案
B
解析
转载请注明原文地址:https://tihaiku.com/zcyy/2842338.html
相关试题推荐
[originaltext]MoreAmericansareGooglingthemselves—andmanyarechecking
[originaltext]MoreAmericansareGooglingthemselves—andmanyarechecking
[originaltext]Extremelyhotweatheriscommoninmanypartsoftheworld.A
[originaltext]Extremelyhotweatheriscommoninmanypartsoftheworld.A
[originaltext]M:Ireallycan’tstandthemanymore!W:Who?Whathappened?M:(
[originaltext]W:Iamabitfedupwithcatchingthesametraineverymorning,
[originaltext]W:Iamabitfedupwithcatchingthesametraineverymorning,
[originaltext]W:Iamabitfedupwithcatchingthesametraineverymorning,
[originaltext]Childhoodpovertyhasbothimmediateandlastingnegativeeff
[originaltext]Childhoodpovertyhasbothimmediateandlastingnegativeeff
随机试题
患者,男,60岁。主诉心胸憋闷疼痛,并放射至肩背,心悸怔忡,有恐惧感,舌紫有瘀点
Thechangeinthatvillagewasmiraculou
A.可在指定的药店凭盖有医疗单位公章的医生处方零售 B.在超市等普通商业部门零
SF6断路器的SF6压力表或密度继电器密封不良,易造成SF6泄漏、表计漏油属于危
已知柱间基础梁上墙体高15m,双面抹灰,墙厚240mm,采用MU10烧结普通砖、
根据脘腹各部位的划分,上腹部剑突下称为 A.心下 B.胃脘 C.大腹 D
从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。( ) A.A
(2016年真题)加强对估值机构、地产经纪和律师事务所等合作机构的准入管理要求银
(2018年真题)企业短期借款利息数额不大的,可以不采用预提的方法,而在实际支付
在分析投资、进度、质量三大目标之间的统一关系时,应()A、掌握客观规律,充分考虑
最新回复
(
0
)