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
2024-02-27
31
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 do properly, a computer must be given instruction -- it must be programmed.
Computers cab be designed for many specialized purposes -- they can be used to prepare payrolls, guide airplane flights, direct traffic, even to play chess. Computers can play an essential role in modern automation in many places and factories throughout the world.
选项
A、The advantages and disadvantages of computers.
B、The future of the computer.
C、The main features of the computer.
D、The scientific principles of the computer.
答案
C
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3488301.html
相关试题推荐
[originaltext]Aresomepeopleborncleverandothersbornstupid?Orisint
[originaltext]M:I’dliketocheckin,please.W:Awfullysorry,sir.Thereare
[originaltext]M:I’dliketocheckin,please.W:Awfullysorry,sir.Thereare
[originaltext]M:I’mgoingtoMr.Blair’shouse.IhavetotakeJennytotheho
[originaltext]M:I’mgoingtoMr.Blair’shouse.IhavetotakeJennytotheho
[originaltext]M:I’mgoingtoMr.Blair’shouse.IhavetotakeJennytotheho
[originaltext]Whydopeoplesmoke?Onereasonisthatpeoplebecomeadd
[originaltext]Whydopeoplesmoke?Onereasonisthatpeoplebecomeadd
[originaltext]W:Hi,LiHua.Whatareyoudoingthissemester?M:Oh,I’mstill
[originaltext]W:Hi,LiHua.Whatareyoudoingthissemester?M:Oh,I’mstill
随机试题
Theinterviewershouldtakedownnotesatthemomenttheperson_________answer
[originaltext]M:Hey,Rachel,sodoyoureadthenewspaperthesedays?W:Actua
[originaltext]Manystudentstrytostudythewholenightanddonotsleepbe
新中国成立初期,女性多采用______等饰物。
以下说法正确的有()。A.干混砂浆分为普通干混砂浆和干混砂浆两种 B.干
李某是某期货公司的期货从业人员,为了争取客户,他私下里与客户约定,保证客户在期货
如图所示一等截面简支梁,则梁中点C处的挠度为()。
A.队列研究 B.实验性研究 C.描述性研究 D.病例对照研究 E.判断
北京市某商业零售企业为增值税小规模纳税人,2020年9月购进货物(商品)取
属于永久荷载的是()。A.固定设备 B.活动隔墙 C.风荷载 D.雪荷载
最新回复
(
0
)