【课件】Unit+1Reading+and+Thinking课件-人教版（2019）选择性必修第二册

Unit1ScienceandScientists

ReadingandThinking

JohnSnowDefeats“KingCholera”Leadin

Areyoufamiliarwiththesesituations?MaskupGetvaccinatedNucleicacidtestsPositivemeasuresaretakentofightagainstCovid-19.LeadinBesidescoronavirus,whatotherkindsofepidemics(流行病)doyouknow?

Discussion&CooperationTask：themainideaofeachparagraphTheexercisesofActivity2onworksheetRequirements:takenotesdownwhilediscussingmarktheunsolvedproblemsandbereadytoputupquestionsJohnSnowDefeats“KingCholera”Readforthemainidea(who)Para.1(how)Para.2-3(what)Para.1ThetruthPara.4ResultsandsignificancePara.5JohnSnowcholeraWho?A________doctorwhoevenattended_______________whenshegavebirth.What?Hehadadesireto________________onceandforall.famousdestroycholeraWhat?Itusedtobeoneof_________________________________________becauseitcauses______________________________________________.When?_____________________________________________________________.Where?_____________________________________________________________.Whatconsequence?Millionsofpeople_______________________________.themostfeareddiseasesintheworldseverediarrhoea,dehydrationandevendeathIntheearly19thcenturyEuropediedfromthediseaseQueenVictoria“KingCholera”=________choleradeadlyWhileReading:Para.1backgroundStagesKeywordsorsentences1.2.3.4.5.

6.7.analysetheresultaskaquestiondrawaconclusioncollectdatafindsupportingevidencethinkofamethodfindaproblemWhileReading：Para.2&3How?twocontradictorytheoriesintwoparticularstreetthecholerawassosevere.....findoutwhymarkingonthemaphousesnumber16,37,38and40;20and21;8and9multipledeathnearthewaterpump;somehouseshadnodeath.awomanandherdaughterhaddied,thewomanlikedthewater....haditdeliveredtoherhouseJohnSnowannouncedthatthepumpwatercarriedcholeragerms.WhatcausedtheoutbreakofcholerainLondonin1854?

Thetruthwasthat

the

waterfromtheBroadStreetpumphadbeeninfectedbywaste.Moreover,Snowwaslaterabletoshowalinkbetweenothercasesofcholeraand

thedifferentwatercompaniesinLondon.SomecompaniessoldwaterfromtheRiver

Thamesthatwaspollutedbyrawwaste.Thepeoplewhodrankthiswaterweremuch

morelikelytogetcholerathanthosewhodrankpureorboiledwater.revealthetruthPara.4

ThroughSnow‘stirelessefforts,watercompaniesbegantosellcleanwater,andthe

threatofcholeraaroundthewordsawasubstantialdecrease.However,choleraisstillaproblem.Eachyear,millionsofpeoplearoundtheworldgetcholeraandmanydiefromit.Fortunately,wenowknowhowtopreventcholera,thankstotheworkofJohn

Snow.Moreover,inhisuseofmapsandstatistics,Snowtransformedthewayscientists

studydiseases.Forthisreason,Snowisconsideredthefatherofmodernepidemiology.resultsandcontributionsPara.5Wascholeradestroyedcompletely？WhatcontributionsdidJohnSnowmaketoscience？UseyourownwordstoexplainJOHNSNOWDEFEATS“KINGCHOLERA”.WhoWhatHow

Postreading

afamousBritishdoctorwhoevenattendedtoQueenVictoriawhenshegavebirth.hadadesiretodestroycholeraonceandforall.Itusedtobeoneofthemostfeareddiseasesintheworld.Itcausesseverediarrhoea,dehydration,andevendeath.Millionsofpeoplediedfromit.Atfirst,…twotheories…Snowsubscribedto….Snowdiscoveredthat…WhenanoutbreakofcholerahitLondonin1854,…marked…onamapThereweremultipledeathsnear...Snowsuspectedthat…announced…...carried.....Accordingly…Throughthisintervention,…Furtherthinking:1.WhatwasthemostimportanttoolSnowusedtodefeatcholera?Whatcommonmedicaltools,e.g.,amicroscope,didn’theuse?Why?

2.HowhasJohnSnow'sworkaffectedourdailylives?1.2.3.4....MapsandstatisticsWhilemicroscopesandothermedicaltoolsmaybegoodatrecoginzingwhatthegermis,findingoutwherethegermcomesfromandhowitspreadsisnotpossiblewiththesetools.readilyavailablecleanwaterwashhandsaftertheybecomedirtytransformthewayscientistsstudydiseasesThinking

WhatmakesJohnSnowagreatscientist?W