人教版高中英语必修四 unit2 woking the land reding2 Chemical or Organic Farming PPT课件 .ppt

ChemicalorOrganicFarming(reading2),Letsunderstandthetitle.Howmanypartsdoyouthinkthepassage?Andwhataretheyabout?Two.1.ChemicalFarming2.OrganicFarming,Listentothepassageandanswerthequestions:1.Overthepastcentury,whathasbecomeincommoninfarming?2.Whatisorganicfarming?3.Whatisthegoalof“organicfarming”?,Usingchemicalfertilizers,Farmingwithoutusingchemicals.,Togrowgoodfoodandavoiddamagingtheenvironmentorpeopleshealth,Readthetextcarefully1.Whyarechemicalfertilizerssopopularinfarming?Stoppingcropdiseaseandincrease_,production,TheproblemscausedbychemicalfertilizersFirst:Overtime:Inaddition:,killingthehelpfulbacteriaandpests,Manychemicalsinthefoodsupplycanleadtocancerorotherillnesses.,Foodgrowstoofasttobefullofmuchnutrition,Whatspecialwaysoffarmingdoorganicfarmersuse?Whydothefarmersdoso?,Usingnaturalwastefromanimalsasfertilizer,Tomakethesoilricherinmineralsandsomorefertile,Changethekindofcropsineachfieldeveryfewyears.,Growcropsthatneeddifferentlevelsofthesoil.,Plantinggrassbetweencrops,Topreventwindorwaterfromcarryingawaythesoil.,Tousedifferentlevelsofsoil,Renewthemineralsinthesoil,chemicalfertilizersnaturalfertilizers,Expressions,1.化肥2.对造成损害3.洗掉某物4.导致;造成(后果);通往5.逐渐增强,建立6.另外(还有)7.使免受(影响);使不含(有害物)8.集中(注意力、精力)于9.每隔几年10.带走11.避免做,chemicalfertilizerscause/dodamagetowashoffleadtobulidupinaddition(to)keepfreefrom/offocusoneveryfewyearsCarryawayavoiddoing,Exercises,cause/dodamageto,washoff,leadto,bulidup,inaddition(to),keepfreefrom/of,focuson,avoiddoing,1.Hismistakes_hisfailure.2.Thesechemicalsinthefoodsupply_inpeoplesbodiesovertime.3.4.Please_yourmind_thefollowingproblem.5.Childrenshould_violence.,ledto,bulidup,focus,on,Allroads_Rome.,leadto,bekeptfreefrom,cause/dodamageto,washoff,leadto,bulidup,inaddition(to),keepfreefrom/of,focuson,avoiddoing,6.Helikesbasketball._,helikesfootball.Helikesbasketball_football.7.LittleTomstuckto_themud_hisshoesbyhimselfbeforehecamein.8.Itriedto_(meet)himbecausehealwaysboresme.9.ThestormonMay3_great_peopleinBurmasofar.,Inaddition,inadditionto,washing,off,avoidmeeting,hascaused,damageto,.Thewholecountrywas_bythestorm,whichhadabad_onpeopleslife.A.affected,effectB.effected,affectC.affected,affectD.effected,effected,Wehavethefinestorganictomatoeshere.Allourtomatoesare100%greenfood.Theyaregrownawayfromfactoriesandfreeofchemicals.Theyaremorenutritiousanddeliciousthanordinarytomatoes.Greenfoodeveryday,healthyalltheway.Actnow!Toknowmoreaboutit,calrvisitusatNo.11JiangbinRoad.,APoster,Wehavethefinestorganictomatoeshere.Allourtomatoesare100%greenfood.Theyaregrownawayfromfactoriesandfreeofchemicals.Theyaremorenutritiousand