Unit1人教版2019选择性必修第二册ScienceandScientistsReadingandThinkingJohnSnowDefeats“KingCholera”

Learningobjectives1.Understandusescientificterms(e.g.,drawaconclusion,Itwasbelievedthat...).ExtractkeyinformationaboutSnow’sresearchsteps.2.Applyreadingstrategies(skimming,scanning)andcollaborateingroupdiscussionsandpresentations.3.Recognizetheuniversalityofscientificresearchandscientists’dedication.4.Analyzetextstructure;criticallyevaluateresearchmethods.

Contents1.Leadin2.Pre-reading3.WhileReading4.PostReading5.Summary6.Languagepoints7.Assessment8.HomeworkContents

01.Leadin

Leadin1.Whatdoyouknowaboutcholera?Choleraisaninfectiousdiseasethatcausesseverewaterydiarrhea(腹泻),whichcanleadtodehydration(脱水)andevendeathifuntreated.ItiscausedbyeatingfoodordrinkingwatercontainingabacteriumcalledVibriocholerae.Thediseaseismostcommoninplaceswithpoorsanitation(卫生设施),crowdingandwar.CommonlocationsincludepartsofAfrica,southAsia,andLatinAmerica.

JohnSnow(1813-1858),hewasanEnglishanesthesiologist(麻醉学家)andepidemiologist(流行病学家)whoisconsideredapioneerinanesthesiologyandpublichealthmedicine.Hewasthefirsttoproposemeasurestopreventcholera,andhisstudyofthe1854choleraoutbreakinSoho,westLondon,isconsideredapioneerinepidemiologicalresearch.JohnSnowLeadin2.WhoisJohnSnow?3.Howcanscientistsdefeatsuchadisease?

02Pre-reading

ReadforpredictionSkimthetitlethepicturetoanswer:·What’sthepassagemainlyabout?·HowdidJohnSnowdefeatcholera?

03While-reading

Skimthepassagetochoosethemainideaofthepassage.A.JohnSnowwasawell-knowndoctorinLondon.B.ThecauseofCholerawaspollutedwater.C.Thesourceofalldrinkingwatershouldbeexamined.D.HowJohnSnowcollected,analyseddataandfoundthecauseofthediseaseanddefeatedit.ReadforMainideas

Para1:Para2:Para3:Pa