人教版高中英语必修五 unit1_Great_Scientists课件.ppt

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1、Unit1GreatScientistsWhatdoyouknowaboutinfectiousdiseases?akindofinfectiousdiseasesWhenyoueatsomefoodthatisnotfresh……Youmayfeel…Maybeyouhavegot________.CholeraCholeraItbeginsinthestomachandaseverecasecanleadtodeathwithoutimmediatetreatment.Andthevictimsdiedveryquicklyfromalossofliq

2、uidafterseverevomiting(呕吐)anddiarrhoea(腹泻).JohnSnowdefeats“kingcholera”Whowasthegreatscientistinthepassageandwhatwasthedeadlydiseaseofitsday?JohnSnowcholeradrawaconclusionThinkofamethodCollectresultsMakeaquestionFindaproblemAnalysetheresultsFindsupportingevidence①③②④⑤⑥⑦Stagesinset

3、tingoutanewscientificidea:DicussingFindaproblemQ:Whatistheproblem?Thecholerawasthemostdeadlydiseaseofitsday.Neitheritscause,noritscurewasunderstood.MakeaquestionQ:Whatwere"twotheories"?1:Choleramultipliedintheairwithoutreason.Acloudofdangerousgaswouldfloatarounduntilitfounditsvict

4、ims.2:Peopleabsorbeditwiththeirmeals.Whichonedoyoubelievemore?WhataboutJohnSnow?Thinkofamethod&CollectresultsQ:Whatmethoddidheuse?First:Hemarkedonamaptheexactplace...Second:Hemadefurtherinvestigation.Third:Helookedintothesourceofthewater.Thinkofamethod&CollectresultsBroadStreetMan

5、ydeathshappenedhere.Nodeathhappenedhere.Thewaterfromthepumpwastoblame.PublichouseAnalysetheresultsManyofthedeathswerenearthewaterpumpinBroadStreet.deathFindsupportingevidenceQ:HowdidJohnSnowfindthesupportingevidence?HefounditfromtwootherdeathslinkedtotheBroadStreetoutbreak.Drawaco

6、nclusionQ:Whatistoblameandhowtopreventitfromhappeningagain?Thepollutedwateristoblame.Thesourceofalldrinkingwatershouldbeexaminedsothatitissafe.1.Thepassagemainlytellsusthat____.thecauseofcholerawaspollutedwaterB.JohnSnowwasawell-knowndoctorinLondonC.thesourceofalldrinkingwatershou

7、ldbeexaminedD.JohnSnowdidsomeresearchandhelpedtosolve“KingCholera”ChoosethebestanswerD2.WhatwasthekeyhelpforJohnSnow’sdiscovery?A.Thegovernment.B.ThewomanmovingawayfromBroadStreet.C.Thewatercompany.D.Themapmadebyhimself.DWhatshouldwepayattentiontoinourdailylifeinordernottogetinfec

8、tedwithcholera?Heatthefoodleftove