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ChemicalorOrganicFarming(reading2)Wordspreviewchemicalproductionbacteriapestnutritionmineraladj.化学的；关于化学的n.生产；制造n.细菌n.害虫；害兽；害鸟n.营养；滋养；食物n.矿物；矿石discoveryfocussoilreducerootn.发现；发觉n.焦点；中心点vt.集中；聚焦n.土壤vt.减少；减缩n.根；根源Wordspreviewskimunderlinesummarycommentvt.浏览；略读vt.画底线标出；强调n.总结；摘要；概要n.评论；议论vi.&vt.表达意见;做出评论WordspreviewLEADIN•Inthisunitwehavelearntaboutagreatman,doyoustillrememberwhoheis?•Whatishisachievement?•Canyouthinkofotherwaystoincreaseourcropharvest?Whatisthematterweputonthesoilwhichmakescropsgrow?Itisfertilizer.chemicalfertilizersnaturalfertilizersSCANNING1.Whatisorganicfarming?Farmingwithoutusingchemicals.2.Whatisthegoalofusingorganicfarmingmethods?Togrowgoodfoodandavoiddamagingtheenvironmentorpeople’shealth.Long-termuseofchemicalfertilizerscancausedamagetothelandandpeople’shealth.Farmersandcustomersturntoorganicfarming.Othermethodstokeepthesoilfertile.SkimmingProblemscausedbychemicalfertilizersMainideaP1.P2.P3.P4.II.Readthetextcarefullyandfillintheblanks.ChemicalFarmingAdvantagesStoppingcropdiseaseandincrease__________productionChemicalFarmingDisadvantagesDamagingtheland:killingthehelpful________________Damagingpeople’shealth:◆Manychemicalsinthefoodsupplycanleadtocancerorotherillnesses.◆Foodgrowstoofasttobefullofmuch________.bacteriaandpestsnutritionOrganicfarmingMethods◆Using_______wastefromanimalsasfertilizer◆Changing______________ineachfieldeveryfewyears◆Using_____________ofsoiltoplantcrops◆Planting_____betweencropsgrassnaturalthekindofcropdifferentlevelsMATCHTHEADVANTAGESWITHTHEREASONS.2.Thesoilisnotexhausted.3.Theymakefulluseofthesoil.C.Thesoilisricherinminerals.A.Peasandsoybeansrenewthemineralsinthesoil.B.Theyplantdifferentcrops,andkeepthesoil.1.Theyusewastefromanimals.Expressions1.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.避免做…chemicalfertilizerscause/dodamagetowashoffleadtobulidupinaddition(to)keep…freefrom/offocusoneveryfewyearsavoiddoing1.supply.1)用作名词时：a)指“供给;供应”等,其反义词为demand(需求)。supplyanddemand供与求beinshortsupply供应缺乏,供应不足foodsupply食物供应watersupply供水b)当“供应品;生活用品;补给品”等,常用复数supplies。militarysupplies军需品householdsupplies家庭用品medicalsupplies医用品2)用作动词时,指“供给,提供,备办”等,supplysb.(with)sth,supplysth.to/forsb.--Theysuppliedfoodto/forthem.他们供给他食物。--Thelibraryiswellsuppliedwithbooks.图书馆备有充足的书籍。[即学即练]用leadto的适当形式完成句子。1.Studentsshouldalwaysrememberthathardworkisthemainwaywhich______success.2.Thebadweather_____aterribleaccidentafewdaysago.ledtoleadsto2.leadto3.focus用法[猜一猜]根据语境推断focus在下列句子中的含义,并从a-d中找出与每句话中的focus相符合的英文释义。1.Thefocusofthemeetingchangedfrompopulationgrowthtotheeducationofwomen.2.Bringtheobjectintofocusifyouwantaclearphotograph.3.Shetriedtofocushermindonherwork.4.SheturnedthecameraandfocusedonMartin’sface.a.thething,person,situation,etc.thatpeoplepayspecialattentiontob.apointordistanceatwhichtheoutlineofanobjectisclearlyseenbytheeyeorthroughalensc.topointacameraatsomething,andchangethecontrolsslightlysothatyoucanseethatthingclearlyd.togivespecialattentiontooneparticularpersonorthing,ortomakepeopledothiscabd[归纳总结]focus作名词,意为“焦点、中心点”;作动词,意为“集中、聚焦”,常构成短语focuson,意为“集中(注意力、精力等)于”。1.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)。2.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）。Exercisescause/dodamageto,washoff,leadto,bulidup,inaddition(to),keep…freefrom/of,focuson,avoiddoing1.Hismistakes_____hisfailure.2.Thesechemicalsinthefoodsupply______inpeople’sbodiesovertime.3.4.Please_____yourmind___thefollowingproblem.5.Childrenshould______________violence.ledtobulidupfocusonAllroads_______Rome.leadtobekeptfreefromcause/dodamageto,washoff,leadto,bulidup,inaddition(to),keep…freefrom/of,focuson,avoiddoing6.Helikesbasketball.___________,helikesfootball.Helikesbasketball_____________football.7.LittleTomstuckto________themud____hisshoesbyhimselfbeforehecamein.8.Itriedto______________(meet)himbecausehealwaysboresme.9.ThestormonMay3___________great__________peopleinBurmasofar.Inadditioninadditiontowashingoffavoidmeetinghascauseddamageto.Thewholecountrywas__bythestorm,whichhadabad___onpeople’slife.A.affected,effectB.effected,affectC.affected,affectD.effected,effectedHOMEWORK1.Writeasummaryoftheadvantagesoforganicfarmingandthedisadvantagesofchemicalfarming.2.Collectsomeinformationaboutthesafetyandimportanceofgreenfood.