【課件】Unit+5+Using+Language+Writing+課件人教版（2019）選擇性必修第一冊(cè)

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

digest11.essential12.mineral1、adj.化學(xué)的2、n.味道3、n.肥料4、n.營(yíng)養(yǎng)5、adj.有機(jī)的6、n.殺蟲劑7、adj.普遍的8、n.細(xì)菌（bacteria）9、相應(yīng)地，依次10、v.消化；領(lǐng)會(huì)n.摘要11、adj.完全必要的；極其重要的12、n.礦物質(zhì)Lead

inWhatmakesplantsgrowbetter?ChemicalfertilizersNaturalwastefrom

animalsChemicalFarmingOrganicFarming

（體育，法律上）對(duì)抗；（比較兩種不同想法、選擇等）與…相對(duì)，與…相比化學(xué)耕作與有機(jī)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______________________________________(化學(xué)農(nóng)藥和人工肥料)havebeeninwidespreaduseinfarmingsincethemiddleofthe20thcentury.Whentheywerefirstintroduced,manyfarmerswelcomedthemasagreatwayto_________________________________________(抵御作物病害、增加產(chǎn)量).Overtime,however,whatsomescientistshavefoundisthat_______________________________________________________________(長(zhǎng)期使用它們有時(shí)會(huì)危害土地和人類健康).Chemicalpesticidesandartificialfertilizersdiseaseandincreaseproductiontheirlong-termusecansometimesharmboththelandandpeople’shealthPara1fightcropReadforusefulexpressionsForexample,pesticidescandamagethelandby_____________________________________________________(殺死有害細(xì)菌和昆蟲的同時(shí)，也殺死有益的細(xì)菌和昆蟲).Inaddition,thesechemicalscanstayinthesoilandundergroundwatersourcesforalongtime.Thisaffectsthecropsgrownonthelandand,________________________________________(繼而影響消化這些作物的人畜).Manypeopleworrythatthesechemicalsmay_________________________________(致病，甚至引發(fā)癌癥).Infact,somepesticideslikeDDThavebeenprohibitedinmostcountriesbecauseofthedamagetheycausetopeopleandtheenvironment.Asforchemicalfertilizers,cropsgrownwiththemusually____________________________(生長(zhǎng)過快而營(yíng)養(yǎng)不足).Theymaylookbeautifulontheoutside,butinsidethereisusuallymorewaterthan______________(必需礦物質(zhì)),andtheyoften____________(口感較差)aswell.killingnotonlyharmfulbacteriainturn,theanimalsandhumanswhodigestthemmakethemillandevencausegrowtoofasttoberichinnutritionessentialmineralshavelessflavorPara2andinsects,butalsohelpfulonescancer_________________(作為一種替代方法),somefarmershaveswitchedto_____________(有機(jī)耕作),andmanycustomershaveturnedto__________(有機(jī)食品)whentheyshopatthelocalgrocery.Organicfarmingissimplyfarming___________________________(不使用任何化學(xué)品).Organicfarmersfocuson_____________________________________________________(通過天然的方法保持土壤肥沃，沒有病害).Forexample,manyorganicfarmersusenaturalwastefromanimalsasfertilizer.This_____________________________________(使農(nóng)田土壤富含礦物質(zhì)).Italsokeepstheair,soil,water,andcropsfreeofchemicals.AsanalternativeorganicfarmingorganicfoodwithoutusinganykeepingtheirsoilrichandfreeofdiseasethroughnaturalmeansmakesthesoilintheirfieldsricherinmineralsPara3chemicalsOrganicfarmersalsousemanyothermethodstoproducerichsoil.Theyoften_____________________________________________(每年更換每塊農(nóng)田種植的作物種類).Forinstance,theymaygrowcornorwheatinafieldoneyear,andthengrowbeanstherethenext.Whydifferentcropsaregrownisbecausetheyputimportantmineralsbackintotheground,makingitreadyforthenextbatchofcrops.Organicfarmersalso______________________________________________(種植土壤深度要求不同的多樣化作物)tohelpkeepitrich.Forexample,peanutsgrowontheground’ssurface,butmanyothervegetablesputdowndeeproots.Thegoalofusingdifferentorganicfarmingmethodsisto_______________________________________________________________(生產(chǎn)優(yōu)質(zhì)食物，同時(shí)避免損害環(huán)境和人類健康).changethekindofcropgrownineachfieldeveryyearplantdiversecropsthatusedifferentgrowgoodfoodwhileavoidingdamagetotheenvironmentortopeople’shealth.Para4depthsofsoilSomepeoplewouldprefertostoptheuseofman-madechemicalsinagricultureentirely.

Whatkeepsthemfromdoingsoisthefactthatchemicalfarming____________________________________________(滿足了全世界對(duì)事物的高要求).

Organicfarmingisnowherenearabletomeetthatneed.Therefore,___________________________________________________________________________________________________________________________________________________(想要找到一個(gè)合適的解決方案，使人類和環(huán)境盡可能保持健康，又讓人們有足夠的食物可吃，還有很長(zhǎng)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____