Unit1 Reading and thinking 课件-高中英语人教版（2019）选择性必修第二册

Unit1ScienceandscientistsJohnSnowDefeats

KingCholeraLeadin

Areyoufamiliarwiththesesituations?MaskupGetvaccinatedSelf-isolationPositivemeasuresaretakentofightagainstCovid-19.BesidesCovid-19,whatotherkindsofepidemics(流行病)doyouknow?4、生熟分开Choleralossofliquid(缺水)severevomiting(呕吐)diarrhoea(腹泻)Itbeginsinthestomachandaseverecasecanleadtodeathwithoutimmediatetreatment.ReadingandThinkingJohnSnowDefeats

KingCholeraPage2：stagesofscientificresearchanalysetheresultsaskaquestiondrawaconclusioncollectdatafindaproblemfindsupportingevidencethinkofamethodOrder?1234567JohnSnowDefeatsKingCholeraTitlePredictionWho？What？When？Where？5W+1HWhy？How？BackgroundPara.1Cholera

usedtobeoneofthemostfeareddiseasesintheworld,untilaBritishdoctor,JohnSnow,showedhowitcouldbeovercome.Thisillnesscausesseverediarrhoea,dehydration,andevendeath.Intheearly19thcentury,whenanoutbreakofcholerahitEurope,millionsofpeoplediedfromthedisease.Asayoungdoctor,JohnSnowbecamefrustratedbecausenooneknewhowtopreventortreatcholera.Intime,herosetobecomeafamousdoctor,andevenattendedtoQueenVictoriawhenshegavebirth.However,heneverlosthisdesiretodestroycholeraonceandforall.1.WhoisJohnSnow？2.Whatisthecholera？JohnSnowaBritishdoctorIntime,herosetobecomeafamousdoctorandevenattendedtoQueenVictoriawhenshegavebirth.Thefatherofmodernepidemiologyexpertexperiencedknowledgeable1.WhoisJohnSnow？Itusedtobeoneofthemostfeared.causeseverediarrhoea,dehydration,andevendeath.nooneknowshowtopreventortreatcholera.deadlyuncontrollable“King”2.Whatisthecholera？Para.2Ingeneral,doctorsinthosedayshadtwocontradictorytheoriestoexplainhowcholeraspread.Onetheorywasthatbadaircausedthedisease.Anotherwasthatcholerawascausedbyaninfectionfromgermsinfoodorwater.Snowsubscribedtothesecondtheory.Itwascorrect,buthestillneededproof.Consequently,whenanoutbreakofcholerahitLondonin1854,Snowbegantoinvestigate.Hediscoveredthatintwoparticularstreetsthecholeraoutbreakwassosevere

thatmorethan500peoplediedintendays.Hewasdeterminedtofindout

why.1.HowmanytheoriesarethereaboutCholera'sspread?2.WhichonedidJohnSnowagreewith?3.Readfor

stagesofscientificresearchfrompara.2-3.Stage1-2findaproblem/askaquestioncontradictory对立的toagreewithanopinion,atheory,etc.subscribeto同意

Find

of证据investigate调查determined决心tocarefullyfindoutthefactsPara.3Stage3-7Stage3thinkofamethodStage4collectdataStage5analyzetheresultsStage6findsupportingevidenceStage7drawaconclusionPara.4-5ThetruthwasthatthewaterfromtheBroadStreetpumphadbeeninfectedbywaste.1.What'sthemainideaofpara.4?2.Howcanwepreventcholera?3.What'stheinfluenceofSnow'sstudyonscience?Q1:What'sthemainideaofparagraph4?Q2:Howcanwepreventcholera?Q3:What'stheinfluenceofSnow'sstudyonscience?ThetruthwasthatthewaterfromtheBroadStreetpumphadbeeninfectedbywaste.Weshoulddrinkpureorboiledwater.Hehelpedpeopleknowhowtopreventcholera.Hetransformedthewayscientistsstudydiseasesbyusingmapsandstatistics.ReadingforthinkingWhatmadeJohnSnowsucceedinpreventing“Kingcholera”?....GroupworkReadingforthinkingscientificspiritsscientificmethodsscientificsuccessThescientistisnotapersonwhogivesther