chemical-or-organic-farming(1).ppt

Chemicalororganicfarming?,Whatisthethingweputonthesoilwhichmakescropsgrow?Itisfertilizer.,Howmanykindsoffertilizersdofarmersuse?Andwhatarethey?Therearetwokinds.Theyarechemicalfertilizersandnaturalwastefromanimals.,Whichkinddofarmersusewhentheyaredoingorganicfarming?,Thesecondone-naturalwastefromanimals,Chemicalororganicfarming?,Difficulties;,1.Usingchemicalfertilizershasbecomeverycommoninfarming.,chemicalfertilizers,common常见的，普遍的,havesthincommon有-共同点,agreatwaytodosth,stopcropdiseaseincreaseproductionlong-termuseofthesefertilizers,problemscausedbychemicalfertilizersbydoingthehelpfulbacteriaandpeststheharmfuloneswashoffthesechemicalsinthefoodsupplybuildupovertimeleadtoinaddition,2.Insidethereisusuallymorewaterthanvitaminsandminerals.,Heismorefatthanshort.sheismoreasingerthananactress.,turntoorganicfarmingfocusonkeeptheirsoilrichandfreeofdisease保持土壤肥沃并且免受病害naturalwastefromanimalsberichinkeep-freefrom-,keepthesoilfertileeveryfewyears,3.Cropssuchaspeasorsoybeansputimportantmineralsbackintothesoil,makingitreadyforcropssuchaswheatorcornthatneedrichandfertilesoil.,differentlevelsofsoil,peanutsthatusethegroundssurfacevegetablesthatputdowndeeproots.prevent-fromdoingavoiddoingsth,Mainideaofthepassage,_fertilizerscancausemany_,soorganicfarmingisbecomingmore_.,Chemical,problems,popular,Structureofthetext,Para1:Usingchemicalfertilizerscanhurtthelandandalsopeopleshealth.Para2:ProblemscausedbychemicalfertilizersPara3:OrganicfarmingisbecomingmorepopularwithsomefarmersandmanycustomersPara4:Othermethodstokeepthesoilfertile.,Reading,Para1:Usingchemicalfertilizerscanhurtthelandandalsopeopleshealth.,1.Whyarechemicalfertilizerssopopularinfarmingtoday?2.Doyouthinkitisreallyagreatway?,Theyareagreatwaytostopcropdiseaseandincreaseproduction.,No,Whatproblemscanbecausedbyusingchemicalfertilizers?(disadvantage),Firstly,theydamagethelandbykillingthehelpfulbacteriaandpests.,Secondly,Chemicalsstayinginthegroundandundergroundwaterforalongtimeaffectscropsand,therefore,animalsandhumans.Andmanyofthechemicalscanleadtocancerorotherillnesses.,Thirdly,fruit,vegetablesandotherfoodgrownwithchemicalfertilizersusuallygrowtoofasttobefullofmuchnutrition.,Para2:Problemscausedbychemicalfertilizers,1.Whatisorganicfarming?2.Whatistheadvantageofusingnaturalfertilizer?,Para3:Organicfarmingisbecomingmorepopularwithsomefarmersandmanycustomers,1.Whatisorganicfarming?,Organicfarmingissimplyfarmingwithoutusingany_.,greenfood,chemicals,2.Whatistheadvantageofusingnaturalfertilizer?,*Reducediseasesincropsandhelpthemgrowstrongandhealthy.*Makethesoilricherinmineralsandsomorefertile.*Besides,keeptheair,soilandwateraswellasthefoodsupplyfreefromchemical.,Para4:Othermethodstokeepthesoilfertile.,Howmanymethodsarementionedinthisparagraph?Andwhatarethey?2.Whatisthesamegoalofthesedifferentorganicfarmingmethods?3.Whydoorganicfarmersgrowpeasorsoybeansaftercornorwheat?,Howmanymethodsarementionedinthisparagraph?Andwhatarethey?,Changethekindofcropineachfieldeveryfewyears.,Three,2)Plantcropstousedifferentlevelsofsoil.,3)Plantgrassbetweencropsandleaveitintheground.,2.Whatisthesamegoalofthesedifferentorganicfarmingmethods?,Thesamegoalistogrowgoodfoodandavoiddamagingtheenvironmentorpeopleshealth.,Farmersgrowpeasorsoybeansaftercornorwheatsothatpeasandsoybeanscanputimportantmineralsbackintothesoil,makingitreadyforcropssuchaswheatorcornthatneedrichandfertilesoil.,3.Whydoorganicfarmersgrowpeasorsoybeansaftercornorwheat?,AnswerstoExercise2onP15:,Changingthecropsrenewsthe_inthesoilandhelpsitbecome_and_.,Thisprevents_or_from_soilandactsasa_fertilizer.,Thisusesdifferent_ofsoil.,Thismakesthesoil_in_andsomore_.,richer,minerals,fertile,minerals,rich,fertile,levels,wind,water,carryingaway,natural,_fromanimalsisagoodkindoffertilizerwhichcanmakethesoilrichin_andsomorefertile.Naturalfertilizershelpdevelopahealthysoilwhichcan_thecropdiseases.Chemicalfertilizersmaykillbothhelpfulandharmful_and_.Plantsomegrassesbetweenthecropstopreventwindorwaterfrom_thesoil.,Naturalwaste,minerals,reduce,bacteriapests,carryingaway,Supposeyouweregivenafarm.Whatwouldyouliketogroworraise?Howwouldyoudealwithyourfarming?,Languagepoints,1.over/inthepasthalfcentury在过去的半个世纪里,2.causedamageto对造成伤害,3.evenmoredangerous甚至更危险的是,4.washoff冲洗掉,Welcome1）名词：迎接gaveusawarm/kind/coldwelcome.她热情地/友好地/冷淡地接待了我们。Shegaveusawarmwelcome.2）感叹词：欢迎欢迎你/你们到我中国来。WelcometoChina.欢迎你/你们回来。Welcomehome/back.3）动词：欢迎welcomesb.(tosp.)welcomesth.格林先生欢迎我们去他家。Mr.Greenwelcomedustohishouse.他不欢迎这项建议。Hedidntwelcomethesuggestion.,4)形容词：受欢迎的，讨人喜爱的你是受欢迎的客人。Youareawelcomeguest.不用谢。Youarewelcome*bewelcometodosth/tosth可随意做某事，可随意取用某物你可以随意借用我的车。Youarewelcometotheuseofmycar.我们欢迎你来访问北京。YouarewelcometovisitBeijing.,2.damage1）用作动词，表示“损害”、“损坏”，通常及物动词。如：那座桥被洪水损坏得很严重。Thebridgewasbadlydamagedbytheflood.抽烟会损坏你的健康。Smokingwilldamageyourhealth.汽车撞到墙上，损失得很严重。Thecarwasbadlydamagedwhenithitthewall.*damage与destroy的区别:damage破坏，损坏的程度不如destroy，且可以修复destroy表彻底毁坏，不可修复。2）1.用作名词，表示“损害”、“毁坏”等，是不可数名词。如：cause/dodamage（to）对造成损失,这次地震造成了很大的损失。Theearthquakecausedgreatdamage.这次暴风雨没有对农作物造成很大的损失。Theheavyraindidntdomuchdamagetothecrops.3.supply1）用作名词时：指“供给;供应”等foodsupply食物供应watersupply供水supplyanddemand供与求,2)用作动词时,指“供给,提供,备办”等,supplysb._sth,sth._sb.,with,to/for,offer,providesth_sbsb_sth,to,for,with,sth_sbsb_sth,WhenImeetdifficulty,myroommateswill_mehelp.,offer,Thegovernmentneedto_foodandclothesfortheseoldpeople,provide,Alltheroomsare_withelectriclights.A.suppliedB.givenC.offeredD.burnt,4.affect1）vt.影响；深深感动，使悲伤；侵袭，感染;他们的意见不会影响我的决定。Theiropinionwillnotaffectmydecision.吸烟影响健康。Smokingaffectshealth.街上的嘈杂声影响了我们的工作。Thenoisefromthestreetaffectedourwork.他的死使我们很感伤。Hisdeathaffectedusdeeply.,他的演讲深深地打动了观众。Hisspeechdeeplyaffectedtheaudience.每年，这种疾病都会是世界上上百万人受到感染。Thisdiseaseaffectsmillionsofpeopleintheworld.*effectn.影响haveaneffecton=affect影响这场水灾给人们的生活带来了不利影响。Thefloodhadabadeffectonpeopleslife.,6.buildup逐渐积聚;增进，增强,来往的车辆在通往市区的路上越聚越多。,Trafficisbuildinguponroadsintothecity.,builduponeshealth/body增强体质,锻炼身体,7.leadto(leadledled)通向;导致（某种）结果；造成,Thisroadleadstotherailwaystation.,Hismistakesledtohisfailure.,AllroadsleadtoRome.条条大路通罗马,8.inaddition(to)除之外;此外;并且,Wemetsomefriendsandotherpeople_._thekilledandwounded,manyweremissing._,IwanttotellyousomethingaboutTom.,in,Inadditionto,Inaddition,addition,inaddition常放在句首,用逗号隔开,或放在句末.inadditionto后面常跟名词或名词短语,9.Theyfocusonkeepingtheirsoilrichandfreeofdisease.,focuson:集中（注意力、精力）于,把注意力集中在你工作上.,Focusyourattentiononyour