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
专升本
The computer is a wonderful machine. It is the most important invention since the type of engine used in cars. Today it has the
The computer is a wonderful machine. It is the most important invention since the type of engine used in cars. Today it has the
admin
2017-03-21
37
问题
The computer is a wonderful machine. It is the most important invention since the type of engine used in cars. Today it has the greatest effect on science, industry and business, but it is being used more in education and medicine. By the end of this century it will touch the lives of everyone, even people in distant villages. It is a revolutionary invention.
The oldest kind of computer is the abacus, used in China since the sixth century. In the seventeenth century an adding machine was invented, but the first large, modern computer was built in 1973. A few years later a computer could do 5,000 additions per second. Now the computations are so fast that they are measured in nanoseconds.
Today most computers are stored-program computers, that is, they have a memory. They are getting smaller and smaller, and computing faster and faster.
Even in a large computer, the part that does the actual computing is about the size of the end of a finger.
Computers can do all kinds of work. When someone buys something in a department store, information about the sale goes into a computer. A scientist can talk to the computer about the rocks, and the computer answers the questions. A doctor can talk to the computer and explains what is wrong with a patient. If the doctor asks why, the computer goes through its stored information and explains exactly why.
When early humans began fanning, it was a revolutionary change in human life. It was hundreds of thousands of years later that people developed a writing system. In less than fifty years people have developed computers that can do most of the things humans can do. This could be a frightening development.
The computations of the computer are measured in______.
选项
A、seconds
B、microseconds
C、milliseconds
D、nanoseconds
答案
D
解析
细节理解题。根据文中第二段中的“Now the computations are so fast that they are measured in nanoseconds.”可知,计算机是以毫微秒来计算的。
转载请注明原文地址:https://kaotiyun.com/show/6DXC777K
本试题收录于:
英语题库普高专升本分类
0
英语
普高专升本
相关试题推荐
Itisn’toftenthatanentireindustryissymbolizedinthefigureofasinglehumanbeing,andsuchisthecasewithCanadiana
Hehasalargecollectionofbooks,______arewritteninEnglish.
Peoplefromdifferentculturessometimesdothingsthatmakeeachotheruncomfortable,sometimeswithoutrealizingit.MostAmer
Airlinecompaniesareresponsiblefortransportingyourluggage.Ifyoucannotrecoveritatthepointofarrival,youmustinfo
Thesimplestwayofputtinganideadownonpaperistodrawapicture.Thatwas【C1】______menfirstbegantowrite,sixthousand
A—ChildHelpB—DamagedBaggageC—DelayedBaggageD—EmergencyMedicalOperationE—HospitalAllowanceF—MedicalExpensesG—Lossof
WithWhatDoYouBuyYourMoney?(10)Twoyearsago,IgavemyyearlytalkbeforetheAppliedPhilosophyInstituteinSunnyva
每一个人都希望这个乏味的讨论马上结束。
Nowputonsunscreen(防晒霜)Somesunscreenspreventsunburnbutnotothertypesofskindamage.Makesureyoursoffersabroadrang
Neitheroftheyoungmenwhohadappliedforapositionintheuniversity______.
随机试题
乌鲁水齐地区(Ⅲ类光气候区)的光气候系数为:[2004年第20题]
有抗震设防的单层工业厂房,下列做法错误的是:
在投标文件的报价单中,如果出现总价金额和分项单价与工程量乘积之和的金额不一致时,应当( )。
班轮运费的计算标准可采用()。
进口属于自由进口的技术,应当向国务院商务主管部门办理登记,并提交()。
下列理论是用于解释经济周期的根源的是()。
本月交纳本月应交的增值税,应借记“应交税金———应交增值税(已交税金)”科目。()
阅读下面材料,选好角度,自拟题目,联系实际,写篇不少于600字的文章,除诗歌以外,文体不限。有一位做母亲的很喜欢带着5岁的女儿逛商店,可是女儿却总是不愿意去,母亲觉得很奇怪,商店里琳琅满目五颜六色的东西那么多,小孩子为什么不喜欢呢?直到有一次,孩子的鞋带
Despitethe(i)____ofmanyoftheircolleagues,somescholarshavebeguntoemphasize“popculture”asakeyfor(ii)____them
AuthorEmmaHeathcote-Jameshasspentnineyearslookingintoreal-lifeghoststories,collectingtalesfromhundredsofpeople
最新回复
(
0
)