人教版高中英语必修五unit1课文重点练习详解

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1、Unit1GREATSCIENTISTSJOHNSNOWDEFEATS“KINGCHOLERA”JohnSnowwasafamousdoctorinLondon—soexpert,indeed,thatheattendedQueenVictoriaasherpersonalphysician.Buthebecameinspiredwhenhethoughtabouthelpingordinarypeople(whowere)exposedtocholera.Thiswasthedeadlydis

2、easeofitsday.Neitheritscausenoritscurewasunderstood.Somanythousandsofterrifiedpeoplediedeverytimetherewasanoutbreak.JohnSnowwantedtofacethechallengeandsolvethisproblem.Heknewthatcholerawouldneverbecontrolleduntilitscausewasfound.(expose:1暴露beexposedt

3、oallkindsofweather.经受风吹雨打。Exposesbtodanger使某人面临危险。AstudentwhohasbeenexposedtoEnglishforsome6years.接触英语达六年左右的学生。2.揭露。Exposeapolitician’slies.Hehasbeenexposedasaliar.他说谎的行为被揭穿。）Hebecameinterestedintwotheories（thatpossiblyexplainedhowcholerakilledpeople

4、）.Thefirstsuggestedthatcholeramultipliedintheair,acloudofdangerousgasfloatedarounduntilitfounditsvictims.Fromthestomachthediseasequicklyattackedthebodyandsoontheaffectedpersondied.JohnSnowsuspectedthatthesecondtheorywascorrectbutheneededevidence.Sowh

5、enanotheroutbreakhitLondon（Therewasanotheroutbreak）in1854,hewasreadytobeginhisenquiry.Asthediseasespreadquicklythroughpoorneighbourhoods,hebegantogatherinformation.Intwoparticularstreets,thecholeraoutbreakwassoseverethatmorethan500peoplediedintendays

6、.Hewasdeterminedtofindoutwhy.Firsthemarkedonamaptheexactplaces（whereallthedeadpeoplehavelived）.Thisgavehimavaluableclueaboutthecauseofthedisease.ManyofthedeathswerenearthewaterpumpinBroadStreet(especiallynumbers163738and40).Healsonoticedthatsomehouse

7、s(suchas20and21BroadStreetand8and9CambridgeStreet)hadhadnodeaths.Hehadnotforeseenthis,sohemadefurtherinvestigations.Hediscoveredthatthesepeopleworkedinthepubat7CambridgeStreet.Theyhadbeengivenfreebeerandsohadnotdrunkthewaterfromthepump.Itseemedthatth

8、ewaterwastoblame,Next,JohnSnowlookedintothesourceofthewaterforthesetwostreets.Hefoundthatitcamefromtheriver（pollutedbythedirtywaterfromLondon）.HeimmediatelytoldtheastonishedpeopleinBroadStreettoremovethehandlefromthepumpsothatitcouldnotbeused.Soonaft