新一代大学英语视听说教程1 U2 PPT 课件

FoodandHealthUnit2Warm-up01ListeningandSpeaking02ViewingandSpeaking03CONTENTSProject04Warm-upWorkinpairsonthefollowingactivities.Readthefoodtermsandthedescriptionscarefully.Thenmatchthedescriptionswiththeterms.Step1Warm-upprocessedfoodWarm-up1Itisfoodthatisgrownorproducedwithoutsynthetic(人造的)pesticidesorchemicalfertilizers.2Itisfoodthatisspeciallytreatedtochangecolorandkeepfresh,etc.3Itisfoodthatisgrownwithinareasonabledistancefromwhereitiseaten.Itdoesnotspenddaysorweekstobetransportedandisthereforegenerallyfresher.4ItisfoodthatisproducedfromorganismsthathavehadspecificchangesintroducedintotheirDNAusingthemethodsofgeneticengineering.5Itisfoodthatisnotprocessedorrefined,orthatisprocessedandrefinedaslittleaspossible,beforebeingconsumed.Itisfoodinitsnaturalstate.organicfoodlocalfoodGMfoodwholefoodWorkinpairsonthefollowingactivities.Listthefoodsthatyouateforbreakfast,lunchandsupperyesterday.Foreachofthem,decidewhetheritisgeneticallymodified,local,whole,processed,ororganic.Step2Warm-upReferenceanswersWarm-upBreakfastMuffinProcessedfoodBananaWholefoodMilkLocalfoodLunchRiceOrganicfoodScrambledeggswithtomatoesLocalfoodSweetandsourporkLocalfoodSupperDumplingsLocalfoodAdditionalActivityReadthefollowingquotesabouthealthyeating.Trytoexplainthequoteswithexamplesoryourpersonalexperiences.1Thosewhothinktheyhavenotimeforhealthyeatingwillsoonerorlaterhavetofindtimeforillness.—EdwardStanley2Theonlywaytokeepyourhealthistoeatwhatyoudon’twant,drinkwhatyoudon’tlike,anddowhatyou’drathernot.—MarkTwainWarm-upReferenceanswers1Mainpoints:Healthyeatingisnotjustaboutkeepingahealthyweight–itaffectsone’stotalstateofwell-being.Pooreatinghabitsarelinkedtoalargenumberofdiseasessuchasheartdisease,strokeanddiabetes.Myfather,forexample,alwaysbuysorganicfoodevenifitismoreexpensive.Hetriestoensureahealthyandbalanceddietforthefamily.2Mainpoints:Tostayhealthy,youwillhavetoeatthosevegetablesandfruitswhichyoumightnotlikeasmuchasjunkfood.Youwillhavetogetupearlyinthemorning,exerciseregularly,ortakethestairsinsteadoftheelevator.Inotherwords,ittakessomeefforttobehealthy.Warm-upListeningandSpeakingTopicOneGeneticallymodifiedfood1ListentoaconversationonGMfoodanddecidewhetherthestatementsaretrueorfalse.Write“T”for“true”and“F”for“false”.ListeningandSpeakingGeneticallymodifiedfoodListeningandunderstanding1ThemanisinfavorofGMfoodbutthewomanisagainstit.2ThewomanthinksthatsheneedstodomorereadingonGMfood.3ThemanthinksthatcontrolsonGMfoodinmostcountriesareloose.4ThemanthinksthatthewomaniscautiousaboutGMfood.5ThewomandoesnotlikethefactthatsomefoodcompaniesareusingherfortheirexperimentsonGMfood.6Thewomanfinallyagreeswiththeman.TFFFTF2Listentotheconversationagainandcompletethetablewithwhatyouhear.ListeningandSpeakingGeneticallymodifiedfoodListeningandunderstandingArgumentsforGMfoodArgumentsagainstGMfood•GMfoodisprobably1)______thannon-GMfoodbecausethereare2)_______________forGMfood.•Geneticmodificationcouldbeusedtomake3)____________enrichedwithvitaminsorbananaswithvaccines.•GMfoodcanbeusedtochangethehabitatsofspeciesandpreventthemfrombecoming4)_________.•GMfoodisunnaturalandthereforepotentiallyrisky.•Wehaven’tdoneenoughresearchandGMfoodisresponsibleforthedestructionofwildlife,forexample,larksarerapidly5)______________________.•Somefoodcompanieswilldominatethe6)______________evenmorethantheydotodayifwestarttorelyonGMfood.•GMfoodcausesnoendofdamagetosomeplantsandanimals.Whenaspeciesdiesoutormutates,ithasaknock-oneffectonthe7)_________________.GeneticallymodifiedfoodListeningandunderstandingsafertightercontrolsvegetablesextinctdecreasinginnumberspoorcountrieswholeecosystemListeningandSpeaking3AlthoughGMfoodhasbeenonsupermarketshelvesforoveradecade,thereisstillextensivecontroversyaboutit.Workintwogroupsandholdaninformaldebateonthetopic“IsGMfoodbeneficial?”.Youcanbaseyourargumentonwhatyou’veheardfromtheconversation,yourownexperienceandreasoning,andwhatyou’velearnedfrombooks,newspapers,ortheInternet.ListeningandSpeakingGeneticallymodifiedfoodThinkingandspeakingListeningandSpeakingGeneticallymodifiedfoodThinkingandspeakingArgumentsforGMfoodArgumentsagainstGMfood•TherehavebeenagreatnumberofstudiestrackingtheeffectsofGMfoodonanimals.ThesestudiesindicatethatGMfoodissafetoconsume.•FarmerswhogrowGMcropsusefewerenvironmentallydamagingpesticides.•GMcropscanhavelargeryields.TheincreasedyieldsofGMcropsareessentialtofeedingtheworld’sgrowingpopulation.•GMfoodcanwithstandcolderweather,droughts,andfloods.•GMcropshaveledtoanincreaseinherbicide-andpesticide-resistantweedsandinsects.•Thereisnoscientificconsensusonthelong-termsafetyofGMfood.•Introducingageneintoaplantmaycauseunexpectedallergicreactionstopeople.•SomeGMfoodshaveantibioticfeaturesbuiltintothem.Peoplewhoconsumethesefoodsmaybecomeresistanttoantibioticdrugs.TopicTwoTruthaboutorganicfoodlabels1Understandingfoodlabelscanhelpyoumakehealthydecisionswhenyoushopforfood.Nowlistentoaprogramtwiceandcompletethetablewithwhatyouhear.ListeningandSpeakingTruthaboutorganicfoodlabelsListeningandunderstandingListeningandSpeakingTruthaboutorganic