Computer--the-Greatest-Invention-of-the-20th-Centu

Computer--theGreatestInventionofthe20thCentury姓名：刘同学学校：北京邮电大学分数：94Inthe20thcentury,socialandtechnologicalinventionsanddiscoveriesoccurredatabewilderingrateandexertedagreaterimpactonpeople'slivesthaneverbefore.Admittedly,someremarkableachievementshavebroughtaboutsignificantchangesinhumansocietysuchastelevision,car,aircraftetc,butfrommyprospectiveitistheinventionofcomputerthathavemadethemostcontributionstotheworldforthefollowingreasons.Tobeginwith,computersenhanceefficiencyandthusgiverisetosocialprogressgreatly.Inthefirstplace,workefficiencyhasbeenlargelyimprovedwiththehelpofvariousproductivitysoftwaresandsystemswhichenablepeopletosearch,processinformationaswellasmakedecisions.Inthesecondplace,computershavebecomeamaindeterminantofscientificresearch.Incontrasttothetimewhenscientistshadtoconductexperimentsanddocalculationontheirown,peoplenowadaysaskcomputerstosimulateexperimentsanddolarge-scaledcomputingtasksmoreoftenthannot.Tosumup,computersareexpectedtodoourworkforus,leavinguswithever-increasingquantitiesoftimeformorecrucialtasks.Secondly,computersplayanimportantroleinenhancingqualityoflife.Twoexamplesthataptlyindicatethispointinvolvethefieldsofentertainmentandonlineshopping.First,theexistenceoftheInternetcreatesanaccesstomyriadsofvideos,songs,games,cartoonsandsoforth,whichwewouldneverpreviouslyhavedreamedofhaving.Second,wearealsoprovidedwithsufficientonlinegoods,whichliberatesusfromthetime-consumingjourneystostoresandmarkets.Finally,computersalsomakecommunicationofpeoplemoreconvenientandefficient.Inancienttimes,peoplecommunicatedwithotherswholivedfarawaybymeansofcarrierpigeon,post-horseandevenhumanbeings,whichinevitablylimitedthetimeliness.Wearefamiliarwiththeoriginofmarathon:aGreekmessengernamedPheidippidesrantheentiredistancefromthebattlefieldofMarathontoAthenswithoutstoppingtoannouncethevictoryoftheirforcesandfinallycollapsedanddiedafteraccomplishinghismission.However,theseareallreplacedbyrapidonlinecommunicationwhichIguaranteeisfarbeyondthewildestdreamsofourancestors.Forinstance,onecaneasilychatwithpeoplewholiveontheothersideoftheearthwithlittletimedelay.Inshort,withoutthegreatcontributionsofcomputers,massesofthingsaboutcommunicationthatmayseemcommontouswouldhavebeenincredible.Inconclusion,Ihighlyrecommendcomputertobeentitledwiththegreatestinventioninthe20thcenturyforthereasonsabove.【评语】本文观点鲜明,能够运用较为复杂的句式表达思想,表达方式灵活且能学以致用,难能可贵！结构上如能点出computer所带来的问题的话就会令本文更加饱满。