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
自考
Today we do not measure the speed of computer functions in minutes, or in seconds, or even in hundredths(1 /100)or thousandths(1
Today we do not measure the speed of computer functions in minutes, or in seconds, or even in hundredths(1 /100)or thousandths(1
admin
2017-06-30
76
问题
Today we do not measure the speed of computer functions in minutes, or in seconds, or even in hundredths(1 /100)or thousandths(1/1000)of seconds. We measure the speed of computers in bil-lionths of seconds. We call one billionth of a second a nanosecond.
Computers were not always so fast, of course. In fact, at one time, the human mind could perform calculations faster than a computer. Let us look briefly at the development of the computer. We will see that the Computer Revolution happened only when computers developed their incredible speed. In 1833, Charles Babbage built his "analytical engine", the first computing machine. His colleague, Augusta Ada, the Countess of Lovelace, continued Babbage’s work. She became the first programmer in history. Fifty years later, Herman Hollerith designed a machine that counted automatically. This machine was used to count the number of people in the United States for the 1890 census. It used a system of punch cards. Hollerith’s company, by the way, eventually became IBM(International Business Machines).
The first large digital computer was built by IBM in 1944. It was called the Mark I. Then in 1947,IBM built the Mark II. Today we cannot imagine how slow these computers were, just as we cannot imagine how fast modern computers are. These computers needed one or two seconds to perform one calculation. In these same years, electronic computers developed. They were much faster than the huge, slow Mark I and Mark II. ENIAC is the name of the first all-electronic computer, built in 1944 and 1945. The world was amazed to learn the speed of this computer: 5 000 additions per second, and 300 multiplications per second. Today we smile at these "slow" speeds.
Then in 1960 the real "revolution" began with the introduction of integrated circuits. Today, thousands of transistor circuits can fit on one small silicon chip. As a result, we now measure the speed of computers in nanoseconds.
The best title for this passage would be______.
选项
A、The Computer and the silicon chip
B、The Computer Revolution: Birth of the Nanosecond
C、Five Thousand Additions in One Second
D、IBM:International Business Machines Corporation
答案
B
解析
转载请注明原文地址:https://kaotiyun.com/show/ihPR777K
本试题收录于:
电子商务英语题库经管类分类
0
电子商务英语
经管类
相关试题推荐
Writteningreathaste,______.
Inancienttimeswealthwasmeasuredandexchangedtangibly,inthingsthatcouldbetouched:foods,tools,andpreciousmetals
Humanbeingsactinadifferentwayfrom【C1】______ofanimalsjustbecausetheycanspeakwhileanimalscannot.Eventhecleveres
Anumberofrecentbookshavereworkedsubjects,formsandwritingtechniques.Today’schildrenreadstoriesaboutdivorce,deat
Therearefivebasicfunctionsofanewspaper;toinform,tocomment,topersuade,toinstructand【C1】______Youmaywellthinkt
Weshalltake______measureswethinkpropertocopewiththesituation.
Exceptionalchildrenaredifferentinsomesignificantwayfromothersofthesameage.Forthesechildrentodeveloptotheirf
Todaywedonotmeasurethespeedofcomputerfunctionsinminutes,orinseconds,oreveninhundredths(1/100)orthousandths(1
JohnHaroldDrakeisamanofdeepcompassion,andhaswrittenabookthatarguesforthecauseofchildreninneedoflove.Chi
JohnHaroldDrakeisamanofdeepcompassion,andhaswrittenabookthatarguesforthecauseofchildreninneedoflove.Chi
随机试题
淋秘
SimonHarperwritesfromtheviewpointofsomeonewho______.Thetwolettersareprobablywritingto______.
关于髂股静脉血栓形成,正确的描述是
口腔念珠菌病通常不会发生于()
在所有的工程中必须配置的工人有()。
入境特殊物品的申报人在特殊物品入境前( )到当地检验检疫机构办理特殊物品审批手续。
下列情形中,属于法律制裁的一项是()。
求下列不定积分:
YoungpeopleintheUnitedStateshaveawidevarietyofinterestsapart【C1】______theirschoolwork.Aschildren,bothboysand
Therainscamethisweekend,muchtothe______oftomatogrowersinthisregion.
最新回复
(
0
)