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
45
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
Recentresearchfromanimalbehavioristssuggeststhat"asthecrowflies"shouldnolongerbetakentomean"theshortestdista
Thequestionofwhetherwarisinevitableisonewhichhasconcernedmanyoftheworld’sgreatwriters.Beforeconsideringthis
Aperson’shomeisasmuchareflectionofhispersonalityastheclotheshewears,thefoodheeatsandthefriendswithwhomh
Mostpeoplewhotravellongdistancescomplainofjetlag(飞行时差反应).Jetlagmakesbusinesstravelerslessproductiveandmorepro
Today,wearegoingtobecontinuingourdiscussionofevolution,specificallyhowtheforcesofnaturalselectionandenvironme
Comparisonsweredrawnbetweenthedevelopmentoftelevisioninthe20thcenturyandthediffusionofprintinginthe15thand
Inordertoobtaintheneededinformation,youshouldwritesimply,clearly,andconcisely______thereaderwantstoknow.
Criticismwithoutsuggestingareasofimprovementisnot______andshouldbeavoidedifpossible.
Advertiserstendtothinkbigandperhapsthisiswhythey’realwayscominginforcriticism.Theircriticsseemtoresentthem
The______soundofmovementsinthekitchensuggestedthatthechildrenweresecretlyhelpingthemselvestothechocolatecake.
随机试题
A上市公司于2012年3月31日通过定向增发本公司普通股对B公司进行合并,取得B公司80%股权。假定不考虑所得税影响,该项业务的有关资料如下:(1)2012年3月31日,A公司通过定向增发本公司普通股,以2股换1股的比例自B公司原股东C公司处取得了B公司
简述外语学习中的语言迁移现象。
10个月婴儿,34周早产,出生体重2kg,鲜牛奶喂养,未添加辅食,发现面色苍白5个月,不爱活动。查体:体重7kg,苍白,肝肋下3cm,脾肋下1.5cm。血红蛋白81g/L,红细胞3.4×1012/L,血小板150×109/L,网织红细胞0.4%。为明确
犬细小病毒病最常用的血清学诊断方法是()
胎盘的组成为
Windows中已安装的打印机删除后,其打印机驱动程序也被删除。()
下列有关通告的适用范围说法正确的是()。
A、 B、 C、 D、 C本数列各项转化为:;可知6.5.4.3和2.3.4.5均为等差数列,故空缺项应为,选项C为本题正确答案。
价值规律作为商品经济的基本规律,其作用有()
如果要组成一个容量为32KB,字长为8位的存储器,共需______个规格为8K×1的芯片。
最新回复
(
0
)