科技改变生活英语ppt课件

WangMF2014-4-8,ScienceandTechnologyAreChangingOurLife,1,Therecanbenodoubtthatthetwentiethcenturyisoneofthemostremarkableinhumanhistoryforitspreviouslyunparalleledrateoftechnologicaladvancesandscientificdiscoveries,aratethatcontinuestothisday.Infact,thereweresomanynewtechnologiesinventedanddiscoveriesmadeinthelastcenturythatitsdifficulttoparethelistdowntojusttheten.However,nowwelookbacktothoseteninnovationsortechnologiesthathavehadthegreatestinfluenceonhumanitybothpositivelyandthenegatively.,2,Nuclearpowerwastothetwentiethcenturywhatsteampowerhadbeentothenineteenth:agamechanger.Suddenlyhumanityhadapowersourcethatdidntpollute,wasefficientandpracticallyunlimited,andsohadthepotentialtochangetheplanetovernight.Unfortunately,itwasatwo-edgedswordinthatthissameenergysourcecouldbeusedtocreatethemostdestructiveweaponsinhistory,threateninghumansurvivalwithitsverypresence.However,itishardtodenytheoverallpositiveimpactnuclearpowerhashad.Thefearofmutuallyassureddestructionprobablypreventedtheworldfromexperiencingathirdworldwar.,10.NuclearPower,3,10.NuclearPower,4,10.NuclearPower,5,10.NuclearPower,6,Itsdifficulttoimagineourworldtodaywithoutcomputers.Ofcourse,theyhavebeenaroundsinceWorldWarTwo,buttheywereclunky,massivelyexpensivethingsthathadallthecalculatingpowerofabrick.WhenSteveWozniakandStephenJobsintroducedtheApplein1976,however,itchangedeverythingandtherestis,astheysay,history.,9.ThePersonalComputer,7,Justasthelocomotivemadetheworldasmallerplaceinthenineteenthcentury,theairplanedidthesameforusinthetwentiethcentury,shrinkingourplanettothepointthatapersoncouldflyanywhereintheworldinamatterofhours.,8.TheAirplane,8,8.TheAirplane,9,ThoughunderdevelopmentinEuropeduringthenineteenthcentury,theautomobiledidntreallybecomeapracticalandreliablesourceoftransportationuntilthetwentiethcentury.2013,Chinasautomobileproductionandsalesbothmorethan20million,hasbeenreelectedforfiveconsecutiveyearsintheworld.ThenumberofprivatecarsinChinareachedonehundredmillion.,7.TheAutomobile,10,Inthetwentiethcentury,rocketsbecamebiggerandmorepowerful.Mostimportantly,theybecamecontrollable,whichsuddenlymadethemusefulbothasweaponsofwarand,evenmorevitally,asourmeansofaccessingouterspace.Withouttherocket,itissafetosaywewouldnotonlyhavenevergonetothemoonorvisitedeveryplanetinoursolarsystem.Rocketsalsoplacesatellitesintoorbitaroundourplanet,sowithoutthemwealsowouldntbeabletouseGPS,predicttheweather,makeinternationalcallsor,forthemostpart,evenuseourcellphonesmuchofthetime.,6.Rocketry,11,12,5.Telephone,Thetelephone,wroteAlexanderGrahamBellinan1877prospectusdrummingupsupportforhisnewinvention,maybebrieflydescribedasanelectricalcontrivanceforreproducingindistantplacesthetonesandarticulationsofaspeakersvoice.Asforconnectingonesuchcontrivancetoanother,hesuggestedpossibilitiesthatadmittedlysoundedutopian:Itisconceivablethatcablesoftelephonewirescouldbelaidunderground,orsuspendedoverhead,communicatingbybranchwireswithprivatedwellings,countryhouses,shops,manufactories,etc.,13,5.Telephone,14,UntilAlexanderFlemingdiscoveredpenicillinin1928,almostanylittlebugthatsomeonepickedupwaspotentiallyfatal.Oncepenicillinandlaterawholerangeofotherantibioticscameonthescene,however,deathduetobacterialinfectionbecamerare,resultinginagreatlyreducedmortalityrateandmuchlongerlife-span.Italsorenderedmanyscourgesofthepastfromsmallpoxandtyphoidtogonorrheaandsyphilisobsoleteor,atleastinthecaseofvenerealdisease,somethingeasilytreatable.WHOCoordinatorforEpidemiologyandBurdenofDiseaseColinMatherssaid:Thelifeexpectancyworldwidehasincreasedfrom64yearsin1990to70yearsin2011.ThedataprovidedinthereportshowthatJapan,SwitzerlandandSanMarinohighestaveragelifeexpectancyreached83yearsofage,4.Medicaladvancement,15,Iknowitdestroysbraincellsandrenderspeopleemotionallyandpsychologicallydamaged,butreally,wherewouldwebewithouttheboobtube?Itissocietysbaby-sitter,newssource,teacher,entertainer,andstory-teller.Worse,mostofuswouldhavenoideawhattodowithourtimewithoutit,whichisprobablythesaddestcommentaryofall.,3.Television,16,WhiletheairplaneshrankourplanettothepointthatonecouldflyfromNewYorktoLondoninsixhours,theinternetmadeitpossibletobethereinafewseconds.Itallowstruthtomakeitintoandoutofrepressivecountries,itfomentsrevolutions,andspreadsliesatthespeedoflight.Italsogivesanyonetheabilitytobuyandsellalmostanythingimaginable,findandtormentoldschoolmates,watchthelatestyou-tubevideos,andevenfindtheirperfectlifepartner,allforafewbucksamonth.Oh,andyoucanalsogetusefulinformationoffitifyoudontmindscrollingthrough15,000hitstofindoutjusthowlongsnailsreallylive.,2.TheInternet,17,Fewpeopletodaycanappreciatetheimpacttheadventofradiohadonthetwentiethcentury.NotonlydiditsuddenlymakeitpossibleforapersontobeheardfromhundredsoreventhousandsofmilesawaywithouttheuseofawirebutitwasthecenteroffamilylifethroughtheendoftheSecondWorldWarandintothedoldrumso