chemical-or-organic-farming-公开课课件

ChemicalOrOrganicFarming?greenfoodorganicfood1.Haveyoueverbeentothecountryside?2.Doyouknowhowtoworkonafarm?Step1:warmingupLet’sgotothefarm!First,buyorselecttheseedsfromthestore.Second,weneedtoploughorturnoverthesoil.Third,wesowtheseedsinthesoil.Finally,wecanharvestourgrain/sorghum/peanuts.Inordertoimprovetheoutputofthecrop,weneedtoridthesoiloftheweed,waterthecrop,fertilizethesoilandkilloffthepest.waterthecropridthesoiloftheweedfertilizethesoilkilloffthepesttoimprovetheoutputofthecropfertilizerHowmanykindsoffertilizersdofarmersuse?Therearetwokinds.Theyarechemicalfertilizersandnaturalones.chemicalfertilizersnaturalfertilizersWhichkinddofarmersusewhentheyaredoingorganicfarming?Doyouknowaboutorganicfarming?ReadingChemicalorOrganicFarming1).化肥2)细菌3).对…造成损害4).洗掉某物5).导致;造成(后果);通往6).逐渐增强,堆积，建立7).另外(还有)8).使…免受(影响);使…不含(有害物)9).集中(注意力、精力)于10).每隔几年11).避免做…fertilizerbacteriacause/dodamagetowashoffleadtobuildupinadditionkeep…freefrom/offocusoneveryfewyearsavoiddoingFirstreading:getthemainideaofeachparagraph.para1:Long-termuseoffertilizerscancausedamagetothelandandpeople‘shealthpara2:Theproblemcausedbychemicalfertilizerspara3:Theadvantagesofusingorganicfarming.para4:Somemethodstokeepthesoilfertile.1Whyarechemicalfertilizerssopopularinfarmingtoday?2Afterthelong-termuseofchemicalfertilizers,whathavescientistsfound?Manyfarmerswelcomedthemasagreatwaytostopcropdiseaseandincreaseproduction.Long-termuseofchemicalfertilizerscancausedamagetothelandand,evenmoredangerous,topeople’shealth.Recently,however,therefore;meanwhile;anyhow;thus;otherwise;moreover;besidesetc.SecondreadingReadparagraph2andfindouttheproblemscausedbyusingchemicalfertilizers.Therearethreeproblems.First,theycandamage…aswellas….Theyalsostayinthe…and….Inaddition,…growtoofastto….first;second;finally;lastbutnotleast,etc.Readparagraph3-4Whataretheadvantagesoforganicfarming?Thefarmersfocusonkeepingtheirsoilrichandfreeofdiseaseandkeepingtheair,soil,waterandcropsfreefromchemicals.Tips:severalphrasescanbeused.Themethodstokeepthesoilfertile1usingnaturalwastefromanimalsasfertilizer.2changingthekindofcropineachfield.3plantingcropstousedifferentlevelsofsoil4plantinggrassbetweencropstoprevent…Thesamegoal:____________________________________________________________________________________________togrowgoodfoodandtoavoiddamagingtheenvironmentorpeople’shealth.Languagepoints1.Thesechemicalsinthefoodsupplybuildupinpeople’sbodiesovertime.buildup增强;建立；开发Hardworkingconditionsbuildupcharacter.艰苦的工作条件能磨练人的性格。Hebuiltuphisstrengthagainafteranillness.他病后逐步恢复体力。2.Manyofthesechemicalscanleadtocancerorotherillnesses.leadto:导致；造成(后果）Toomuchworkandtoolittlerestoftenleadtoillness.过量的工作和过少的休息会引起疾病。AllroadsleadtoRome.条条大道通罗马。通往[即学即练]用leadto的适当形式完成句子。1.Studentsshouldalwaysrememberthathardworkisthemainwaywhich________success.2.Thebadweather________aterribleaccidentafewdaysago.leadstoledto[联想]resultin引起(某种结果)、使获得(某种成果)、结果……。如：Theaccidentresultedintwodeaths.resultfrom由……造成、因……而产生。如：Sicknesssometimesresultsfromeatingtoomuch.含介词to的东侧短语：cometo来到，苏醒referto参考，涉及lookforwardto盼望payattentionto注意stickto坚持devoteto致力于turntogetcloseto靠近3.Theyfocusonkeepingtheirsoilrichandfreeofdisease.focuson:集中(注意力，精力等）于Focusonlife.focusone’sattentionon集中注意力于focusone’smindon把心思集中到……上Youshouldfocusyourattentiononyourwork.你应该把注意力集中在你的工作上。EW他需要更集中于他的事业。Heneedstofocusmoreonhiscareer.瞄准生活。4.reducevt.减少，减缩•Theyhavetoreduceexpensesthisyear.•他们今年必须削减开支。•搭配•reduceto减到，降到•reduceby减了，降了•Pleasereduce______2%offtheinvoiceprice.•Thewaterwillfreezewhenthethermographreduces_____zerocentigrade.byto5.Thisalsokeepstheair,soil,waterandcropsfreefromchemicals.这样还可以让空气、土壤、水以及农作物不受化学物质的污染。keep…freefrom/of…使……免受(影响/伤害等)锻炼能使我们摆脱疾病。Exercisecankeepusfreefromdisease.联合国正试图使世界免受战争的威胁。TheUnitedNationistryingtokeeptheworldfreefromthethreatofwar.6.Cropssuchaspeasorsoybeansputimportantmineralsbackintothesoil,makingitreadyforcropssuchaswheatorcornthatneedrichandfertilesoil.[分析]①本句结构比较复杂。其主干结构为:主句(Cropsputimportantmineralsbackintothesoil)+状语(makingitreadyforcrops)。②状语中又包含“make+it+形容词”结构和由that引导的定语从句(thatneedrichandfertilesoil)。7.Someorganicfarmerspreferplantinggrassbetweencropstopreventwindorwaterfromcarryingawaythesoil,andthenleavingitinthegroundtobecomeanaturalfertilizerforthenextyear’scrop.[分析]①本句的主干结构是一个简单句,其结构是:主语(farmers)+谓语(prefer)+并列宾语(planting...+leaving...)。②其中betweencrops和intheground作地点状语。③两个宾语后面又分别带有一个不定式作目的状语（topreventwindorwaterfromcarryingawaythesoil和tobecomeanaturalfertilizerforthenextyear’scrop）。para1:Anewdiscoveryofscientists.para2:Severalproblemscausedbyusingchemicalfertilizers.para3:Theadvantagesofusingorganicfarming.para4:Somemethodstokeepthesoilfertile.ThestructureofthispassagePara1TopicPara2ProblemsPara3AdvantagesPara4Severalmethodsillustration（阐明）comparisonconclusionThetypeofthearticleis_____________exposition（说明文）Firstreading:getthemainideaofeachparagraph.para1:Long-termuseoffertilizerscancausedamagetothelandandpeople‘shealthpara2:Theproblemcausedbychemicalfertilizerspara3:Theadvantagesofusingorganicfarming.para4:Somemethodstokeepthesoilfer