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
2024-02-17
89
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、One second.
B、Two years.
C、One minute.
D、A day.
答案
C
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3458601.html
相关试题推荐
[originaltext]AyearagoAugust,DaveFusslosthisjobdrivingatruckfor
[originaltext]IgrewupinahousewheretheTVwasseldomturnedonandwi
[originaltext]IgrewupinahousewheretheTVwasseldomturnedonandwi
[originaltext]TheengineerCamilloOlivettiwas40yearsoldwhenhestarte
[originaltext]TheengineerCamilloOlivettiwas40yearsoldwhenhestarte
[originaltext]TheengineerCamilloOlivettiwas40yearsoldwhenhestarte
[originaltext]M:Hi,Helen,I’vebeenlookingforyou!W:Really?Suchacoinci
[originaltext]M:Hi,Helen,I’vebeenlookingforyou!W:Really?Suchacoinci
[originaltext]M:Thenewmayorisreallyagoodpublicspeaker.Thespeechhed
[originaltext]M:Thenewmayorisreallyagoodpublicspeaker.Thespeechhed
随机试题
Wemaylookattheworldaroundus,butsomehowwemanagenottoseeituntilwh
Thereisarealpossibilitythattheseanimalscouldbefrightened,______asudde
A15-year-oldgirlhasbeenarrested_____accusationsofusingInstagramtoanon
Forthispart,youareallowed30minutestowriteashortessayentitledCo
下列选项中( )全面叙述了与混凝土耐久性有关的因素。 Ⅰ.环境类别; Ⅱ.设
丹毒是一种什么样的炎症()A.急性管状淋巴管炎 B.急性网状淋巴管炎
世界文学史上第一部正面描写工人阶级生活和斗争的长篇小说是( )A.《名利场》
(2017年真题)按照法律形式分类,投资基金的主要类别不包括()。A.公司
期货公司应当按照企业会计准则的规定确认预计负债
小于10nm微粒可缓慢积集于A.肝脏 B.脾脏 C.肺 D.淋巴系统 E
最新回复
(
0
)