【课件】Unit+5+Using+Language+Writing+课件人教版（2019）选择性必修第一册

U5WorkingtheLandEvaluatechemicalfarmingandorganicfarmingReadingforWriting1.chemical2.flavor3.fertilizer4.nutrition5.organic6.pesticide7.widespread8.bacterium9.inturn10.

digest11.essential12.mineral1、adj.化学的2、n.味道3、n.肥料4、n.营养5、adj.有机的6、n.杀虫剂7、adj.普遍的8、n.细菌（bacteria）9、相应地，依次10、v.消化；领会n.摘要11、adj.完全必要的；极其重要的12、n.矿物质Lead

inWhatmakesplantsgrowbetter?ChemicalfertilizersNaturalwastefrom

animalsChemicalFarmingOrganicFarming

（体育，法律上）对抗；（比较两种不同想法、选择等）与…相对，与…相比化学耕作与有机耕作Versus1.Whydidmanyfarmerswelcometheintroduction

ofchemicalfarming?Manyfarmerswelcomedthemasagreatwayto

fightcropdiseasesandincreaseproduction.2.Whatconcernsmanypeopleabouttheuseof

pesticides?

Theirlong-termusecansometimesharmboth

thelandandpeople’shealth.Paragraph13.Whatisoneproblemwiththeuseofchemical

fertilisers?

Cropsgrownwiththemusuallygrowtoofastto

berichinnutrition.Paragraph24.Howisorganicfarmingdifferentfromchemicalfarming?Organicfarmingissimplyfarmingwithoutusinganychemicals.

Organicfarmersfocuson

keepingtheirsoilrichandfreeofdiseases

throughnaturalmeans.Paragraph35.Whydoorganicfarmerschangethekindof

cropgrowninafieldeveryyear?

Differentcropsaregrownbecausetheyput

importantmineralsbackintotheground,makingitreadyforthenextbatchofcrops.Paragraph46.

Whatisthegoalofusingorganicfarmingmethods?

Thegoalofusingdifferentorganic

farming

methodsistogrowgoodfoodwhileavoidingdamagetotheenvironmentortopeople’shealth.Paragraph4A.Whatorganicfarming

isB.Whyman-madechemicalsarestillusedinfarming

C.Organicmethods

forproducingrichsoil

D.Theproblems

withchemicalfarmingPara.1-2Para.3Para.4Para.5extensivereadingTitle

Texttype:Exposition

farming

chemicalPart1:(Para1&2)__________farmingorganicPart2:(Para3&4)Part3:(Para5)_________conclusionextensivereading1.Whatischemicalfarming?Whatisorganicfarming?ChemicalVersusOrganicFarmingOrganicfarmingissimplyfarming_________________.Chemicalfarmingisfarmingwith_________,especially___________________and__________________.while

chemicalschemicalpesticidesartificialfertilizerswithoutchemicalsParaMainIdeaDetail1-2Pesticides can kill helpful

.Some pesticides have been

 becauseofthe

.Crops grown with chemical fertilisers usually

tobefullof

.3Many organic farmers use

asfertiliser.DAbacteriaandinsectsprohibiteddamagetheycausegrowtoofastnutritionnaturalwastefromanimalsbenefitsproblemsParaMainIdeaDetail4They often

grownineachfield

.They also plant crops that use 

ofthesoiltohelpkeepitrich.5Organic farming is nowhere near able to meet the high

.CBchangethekindofcropeveryyeardifferentdepthsdemandforfoodaroundtheworldhowitkeepthesoilrichFarmingadvantagedisadvantagechemicalfarmingorganicfarming

Listtheadvantagesanddisadvantagesofeachfarming1.fightcropdiseaseeffectively2.increaseproduction1.keepthesoilrich2.keeptheenvironment

andcropsfreeofchemicals3.producecropswithmuchnutritionandflavor1.harmtheenvironmentandhealth2.producecropswithlessnutritionandflavor1.producefoodwithlowoutput

...Summarize______________________________________(化学农药和人工肥料)havebeeninwidespreaduseinfarmingsincethemiddleofthe20thcentury.Whentheywerefirstintroduced,manyfarmerswelcomedthemasagreatwayto_________________________________________(抵御作物病害、增加产量).Overtime,however,whatsomescientistshavefoundisthat_______________________________________________________________(长期使用它们有时会危害土地和人类健康).Chemicalpesticidesandartificialfertilizersdiseaseandincreaseproductiontheirlong-termusecansometimesharmboththelandandpeople’shealthPara1fightcropReadforusefulexpressionsForexample,pesticidescandamagethelandby_____________________________________________________(杀死有害细菌和昆虫的同时，也杀死有益的细菌和昆虫).Inaddition,thesechemicalscanstayinthesoilandundergroundwatersourcesforalongtime.Thisaffectsthecropsgrownonthelandand,________________________________________(继而影响消化这些作物的人畜).Manypeopleworrythatthesechemicalsmay_________________________________(致病，甚至引发癌症).Infact,somepesticideslikeDDThavebeenprohibitedinmostcountriesbecauseofthedamagetheycausetopeopleandtheenvironment.Asforchemicalfertilizers,cropsgrownwiththemusually____________________________(生长过快而营养不足).Theymaylookbeautifulontheoutside,butinsidethereisusuallymorewaterthan______________(必需矿物质),andtheyoften____________(口感较差)aswell.killingnotonlyharmfulbacteriainturn,theanimalsandhumanswhodigestthemmakethemillandevencausegrowtoofasttoberichinnutritionessentialmineralshavelessflavorPara2andinsects,butalsohelpfulonescancer_________________(作为一种替代方法),somefarmershaveswitchedto_____________(有机耕作),andmanycustomershaveturnedto__________(有机食品)whentheyshopatthelocalgrocery.Organicfarmingissimplyfarming___________________________(不使用任何化学品).Organicfarmersfocuson_____________________________________________________(通过天然的方法保持土壤肥沃，没有病害).Forexample,manyorganicfarmersusenaturalwastefromanimalsasfertilizer.This_____________________________________(使农田土壤富含矿物质).Italsokeepstheair,soil,water,andcropsfreeofchemicals.AsanalternativeorganicfarmingorganicfoodwithoutusinganykeepingtheirsoilrichandfreeofdiseasethroughnaturalmeansmakesthesoilintheirfieldsricherinmineralsPara3chemicalsOrganicfarmersalsousemanyothermethodstoproducerichsoil.Theyoften_____________________________________________(每年更换每块农田种植的作物种类).Forinstance,theymaygrowcornorwheatinafieldoneyear,andthengrowbeanstherethenext.Whydifferentcropsaregrownisbecausetheyputimportantmineralsbackintotheground,makingitreadyforthenextbatchofcrops.Organicfarmersalso______________________________________________(种植土壤深度要求不同的多样化作物)tohelpkeepitrich.Forexample,peanutsgrowontheground’ssurface,butmanyothervegetablesputdowndeeproots.Thegoalofusingdifferentorganicfarmingmethodsisto_______________________________________________________________(生产优质食物，同时避免损害环境和人类健康).changethekindofcropgrownineachfieldeveryyearplantdiversecropsthatusedifferentgrowgoodfoodwhileavoidingdamagetotheenvironmentortopeople’shealth.Para4depthsofsoilSomepeoplewouldprefertostoptheuseofman-madechemicalsinagricultureentirely.

Whatkeepsthemfromdoingsoisthefactthatchemicalfarming____________________________________________(满足了全世界对事物的高要求).

Organicfarmingisnowherenearabletomeetthatneed.Therefore,___________________________________________________________________________________________________________________________________________________(想要找到一个合适的解决方案，使人类和环境尽可能保持健康，又让人们有足够的食物可吃，还有很长的路要走).servesthehighdemandforfoodaroundtheworldsuitablesolutionthatputssufficientfoodonthedinnertablewhilekeepingpeopleandtheenvironmentashealthyaspossible.Para5thereisstillalongwaytofindaReadfortraditionalwordsChemicalpesticidesandartificialfertilisershavebeeninwidespreaduseinfarmingsincethemiddleofthe20thcentury.Whentheywerefirstintroduced,manyfarmerswelcomedthemasagreatwaytofightcropdiseaseandincreaseproduction.Overtime,①_________,whatsomescientistshavefoundisthattheirlong-termusecansometimesharm③________theland______people’shealth.②____________,pesticidescandamagethelandbykilling③________harmfulbacteriaandinsects,___________helpfulones.③___________,thesechemicalscanstayinthesoilandundergroundwatersourcesforalongtime.Thisaffectsthecropsgrownonthelandand,inturn,theanimalsandhumanswhodigestthem.howeverbothandForexamplenotonlybutalsoInadditionManypeopleworrythatthesechemicalsmaymakethemillandevencausecancer.②___________,somepesticideslikeDDThavebeenprohibitedinmostcountriesbecauseofthedamagetheycausetopeopleandtheenvironment.⑤_______chemicalfertilisers,cropsgrownwiththemusuallygrowtoofasttoberichinnutrition.Theymaylookbeautifulontheoutside,①_______insidethereisusuallymorewaterthanessentialminerals,③_______theyoftenhavelessflavour_______.⑤________________,somefarmershaveswitchedtoorganicfarming,andmanycustomershaveturnedtoorganicfoodwhentheyshopatthelocalgrocery.Organicfarmingissimplyfarmingwithoutusinganychemicals.InfactAsforbutandaswellAsanalternativeOrganicfarmersfocusonkeepingtheirsoilrichandfreeofdiseasethroughnaturalmeans.②____________,manyorganicfarmersusenaturalwastefromanimalsasfertiliser.Thismakesthesoilintheirfieldsricherinminerals.It③_________keepstheair,soil,water,andcropsfreeofchemicals.Organicfarmers③_________usemanyothermethodstoproducerichsoil.Theyoftenchangethekindofcropgrownineachfieldeveryyear.②___________,theymaygrowcornorwheatinafieldoneyear,andthengrowbeanstherethenext.④___________________________________________theyputimportantmineralsbackintotheground,makingitreadyforthenextbatchofcrops.ForexamplealsoForinstancealsoWhydifferentcropsaregrownisbecauseOrganicfarmers③________plantdiversecropsthatusedifferentdepthsofsoiltohelpkeepitrich.②____