【天津专版】2020年高考英语二轮复习文档 专题三 阅读理解 第三节 题组2 含答案.doc

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1、A(2017·河东区一模)Doyoueverwishforalittlemoretimetodoeverythingyouneedtodo？Well，onJuly1you’llbegettingit—butonlyonemoresecond.OnJuly1atexactly7：59：59a．m.Beijingtime(oronJune30at23：59：59UTC，CoordinatedUniversalTime)，theworld’satomic(原子的)clockswillpauseforasinglesecond，or，moreprecisely，change

2、totheunusualtimeof7：59：60，accordingtotheverge.com.Theadditionofaleapsecond(闰秒)，announcedbytheParisObservatory，istokeepourclocksintimewiththeslowingofEarth’srotation(旋转)andastronomicaltimeasmeasuredbythesun.Justoneextrasecondcouldcausebigproblemsandaffectthewaycomputersandwebsiteswork，h

3、owever.Whenthelastleapsecondwasaddedbackin2012，morethanafewwebsiteshadsometrouble.AsreportedbyPhys.org，popularsiteslikethecommunitywebsiteRedditcrashedwhentheleapsecondwasadded.ForReddit，theproblemwaseventuallyfoundtobewithaLinuxsystemthatgotconfusedwhenitcheckedthenetworktimeandfounda

4、nextrasecond.SpeakingtoWiredabouttheproblembackin2012，LinuxcreatorLinusTorvaldscommented：“Almosteverytimewehavealeapsecond，wefindsomething.It’sreallyannoying，becauseit’scode(代码)thatisalmostneverused，andthusnottestedbyusersundertheirnormalconditions.”Companieshavehadtothinkoftheirownsol

5、utions，andGoogle’s“leapsmear”maybethebest-knownexample.AscompanyengineerChristopherPascoeexplainsinablogpost，companiesusuallytrytofixtheproblembyturningbacktheclocksbyonesecondattheendofthedaysothattheyplaythatsecondagain.However，Pascoebelievesthiscreatesproblems.Heasked：“Whathappens？D

6、oese-mailthatcomesinduringthatsecondgetstoredcorrectly？”Googlehasasolution：Cuttheextrasecondintomillisecondsandthenputthesetinyamountsoftimeintothesystemthroughouttheday.“Thismeansthatwhenitbecametimetoaddanextrasecondatmidnight，”saysPascoe.“Ourclockshavealreadytakenthisintoaccountover

7、thecourseoftheday.”FormanycompanieswithoutGoogle’smoney，however，theleapsecondwilllikelystillcausesomecrashes.Don’tworry，though—atleastitwon’tlastlong!语篇解读　本文主要介绍了“闰秒”带来的影响及其解决方案.1．Whydoweneedtoaddaleapsecond?A．Theworld’satomicclocksaresettodoso.B．Tokeepintimewiththeworld’scomputers.C