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

Unit5WorkingthelandChemicalversusOrganicfarming[?v??s?s]prep.與…相對(duì);與…對(duì)陣Whatcanbeusedtomakeplantsgrowbetter?Fertilizer.ChemicalfertilizersNaturalwastefromanimalsLead-inToprotectthecrops,farmershavetokillofftheharmfulpests.Q：Whatisusedforkilling

pests,especiallyinsects?A：Pesticides.OrganicFarmingOrganicfarmingissimplyfarmingwithoutusinganychemicals.Chemicalororganicfarming?Whichtomatoesdoyouprefer?5yuan/kg30yuan/kgNormaltomatoesOrganictomatoes1.Whatisthetextabout?ChemicalfarmingOrganicfarming

picturestitle2.Whattypeofwritingisit?A.Narration(記敘文)B.Exposition(說明文)C.Argumentation(議論文)

Pre-readingFastreadingMatchthemainideaswiththeparagraphsPara1-2Para3Para4Para5A.WhatorganicfarmingisB.Whyman-madechemicalsarestillusedinfarmingC.OrganicmethodsforproducingrichsoilD.TheproblemswithchemicaifarmingParagraphMainIdeaDetail1-2Pesticides?can?kill?helpful

.Some?pesticides?have?been

becauseofthe

.Crops?grown?with?chemical?fertilisers?usually

tobefullof

.3Many?organic?farmers?use

asfertiliser.DAbacteriaandinsectsprohibiteddamagetheycausegrowtoofastnutritionnaturalwastefromanimalsCarefulreadingParagraphMainIdeaDetail4They?often

grownineachfield

.They?also?plant?crops?that?use?

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

.CBchangethekindofcropeveryyeardifferentdepthsdemandforfoodaroundtheworldComprehending1.Whydidmanyfarmerswelcometheintroductionofchemicalfarming?A.Becauseitcostlessthantraditionalfarming.B.Becauseitcanfightcropdiseaseandincreaseproduction.C.Becauseitwasn’tharmfultopeople’shealthortheland.D.Becauseitcouldmakethesoilricherinminerals.B2.Thefollowingaretheproblemsofchemicalfarmingexcept

.A.Pesticidescankillhelpfulbacteriaandinsects.B.Longtermuseofitwillharmthelandandourhealth.C.Cropswillgrowfasterandlookmorebeautiful.D.Itwillcausedamagetotheenvironment.C3.Whydoorganicfarmerschangethekindofcropgrownineachfieldeveryfewyears?A.Ithelpsputimportantmineralsbackintotheground.B.Itcanavoiddamagetotheenvironment.C.Itcanhelpincreaseoutput.D.Thewriterdidn’ttellus.A4.Whycan’twestoptheuseofman-madechemicalsinagricultureentirely?A.Organicfarmingcostusalotofmoney.B.Organicfarmingcanmeetpeople’sneed.C.Chemicalfarmingbroughtushugeprofit.D.Chemicalfarminghelpsservetheneedforfood.D5.Whatistheauthor’spurposeofwritingthepassage?A.Tocallonfarmerstoturntoorganicfarming.B.Tointroducesomegoodwaystomakethesoilrich.C.Tourgethegovernmenttostopusingpesticides.D.Togivesomeadviceonhowtoincreasetheoutputofcrops.ASummary

Chemicalpesticidesandartificialfertilisershavebeeninwidespreaduseinfarming1.______themiddleofthe20thcentury,butscientistsfoundthattheirlong-termusecansometimesdoharmtoboththelandandpeople'shealth.Inmost2.__________(country),somepesticideslikeDDThavebeenprohibitedbecauseofthedamage3._______(cause)topeopleandtheenvironment.4.___________(solve)theproblem,

somefarmershaveswitchedtoorganicfarming.Theyusenaturalwastefromanimalsasfertiliserinsteadofartificialfertilisers.sincecountriescausedTosolveBy5._______(do)so,they

makethesoilintheirfields6._______(rich)inmineralsthanbefore.Manyothermethodsarealsousedtoproducerichsoil.Farmersoftenchange7.________kindofcropgrownineachfield

everyyear.Inthisway,someimportantminerals

8.________(put)backintotheground.

Somepeoplewouldprefertostoptheuseofman-madechemicalsinagriculture9.__________(complete),butorganicfarmingcan'tservethehighdemandforfoodaroundtheworld.Soscientistshavetofindasuitablesolution10.______theproblem.doingrichertheareputcompletelytoPara1

Chemicalpesticidesandartificialfertilisershavebeeninwidespreaduseinfarmingsincethemiddleofthe20thcentury.Whentheywerefirst

introduced,manyfarmerswelcomedthemasagreatwaytofightcropdiseaseandincreaseproduction.Overtime,however,whatsomescientistshavefoundisthattheirlong-termusecansometimesharmboththelandandpeoples’health.pesticiden.殺蟲劑inwidespreaduse在廣泛使用中introducev.推行；實(shí)施；采用overtime隨著時(shí)間的流逝Para2

Forexample,pesticidescandamagethelandbykillingnotonlyharmfulbacteriaandinsects,butalsohelpfulones.Inaddition,thesechemicalscanstayinthesoilandundergroundwatersourcesforalongtime.Thisaffectsthecropsgrownonthelandand,inturn,theanimalsandhumanswhodigestthem.Manypeopleworrythatthesechemicalsmaymakethemillandevencausecancer.Infact,somepesticideslikeDDThavebeenprohibitedinmostcountriesbecauseofthedamagetheycausetopeopleandtheenvironment.Asforchemicalfertilisers,cropsgrownwiththemusuallygrowtoofasttoberichinnutrition.Theymaylookbeautifulontheoutside,butinsidethereisusuallymorewaterthanessentialminerals,andtheyoftenhavelessflavouraswell.bacterian(單數(shù)bacterium）細(xì)菌inturn相應(yīng)地；轉(zhuǎn)而；依次digestvtvi消化；vt領(lǐng)會(huì)；領(lǐng)悟asfor至于

too...to...太...而不能...essential:adj.完全必要的；極其重要的Para3

Asanalternative,somefarmershaveswitchedtoorganicfarming,andmanycustomershaveturnedtoorganicfoodwhentheyshopatthelocalgrocery.Organicfarmingissimplyfarmingwithoutusinganychemicals.Organicfarmersfocusonkeepingtheirsoilrichandfreeofdiseasethroughnaturalmeans.Forexample,manyorganicfarmersusenaturalwastefromanimalsasfertiliser.Thismakesthesoilintheirfieldsricherinminerals.Italsokeepstheair,soil,water,andcropsfreeofchemicals.alternativen.可供選擇的事物switchto/turnto

轉(zhuǎn)向，轉(zhuǎn)變groceryn.

食品雜貨店（pl食品雜貨）keep...freeof/from

使...免受...傷害（或影響等）throughnaturalmeans通過天然的方法Para4

Organicfarmersalsousemanyothermethodstoproducerichsoil.Theyoftenchangethekindofcropgrownineachfieldeveryyear.Forinstance,theymaygrowcornorwheatinafieldoneyear,andthengrowbeanstherethenext.Whydifferentcropsaregrownisbecausetheyputimportantmineralsbackintotheground,makingitreadyforthenextbatchofcrops.Organicfarmersalsoplantdiversecropsthatuseddifferentdepthsofsoiltohelpkeepitrich.Forexample,peanutsgrowontheground’ssurface,butmanyothervegetablesputdowndeeproots.Thegoalofusingdifferentorganicfarmingmethodsistogrowgoodfoodwhileavoidingdamagetotheenvironmentortopeople’shealth.forinstance/forexample例如，比如depthn.向下（或向里）的距離；深度putdownroots生根；定居Para5

Somepeoplewouldprefertostoptheuseofman-madechemicalsinagricultureentirely.Whatkeepsthemfromdoingsoisthefactthatchemicalfarmingservesthehighdemandforfoodaroundtheworld.Organicfarmingisnowherenearabletomeetthatneed.Therefore,thereisstillalongwaytofindasuitablesolutionthatputssufficientfoodonthedinnertablewhilekeepingpeopleandtheenvironmentashealthyaspossible.entirelyadv.全部地；完整地；完全地servevt

對(duì)...有用，能滿足...需要serve/meet/satisfythedemandfor滿足對(duì)...需要

nowherenear遠(yuǎn)沒有；遠(yuǎn)不及

Words&expressionsreview1.被廣泛使用2.隨著時(shí)間推移3.長(zhǎng)期的使用4.反過來，相反地5.v.禁止6.v.富含...7.必需的礦物質(zhì)beinwidespreaduseovertimelong-termuseinturnprohibitedberichinessentialminerals8.轉(zhuǎn)向9.專注于10.例如11.滿足對(duì)食物的高需求12.遠(yuǎn)非如此，遠(yuǎn)遠(yuǎn)不13.盡可能的健康switchtofocuson/bedevotedtoforinstance,servethehighdemandforfoodmeettheneed/satisfytheneedofnowherenear/Thisisfarfromthecase.ashealthyaspossibleWords&expressionsreviewUnit5WorkingthelandArgumentativewriting如何寫優(yōu)缺點(diǎn)型議論文OutlinePara.1Para.2YouropinionAdvantage2Para.3DisadvantageAdvantage1IntroductionBodyConclusionRestateyouropinionTitleDetailsDetailsDetails添加標(biāo)題Writeyourownessay我們班關(guān)于有機(jī)農(nóng)業(yè)和化學(xué)農(nóng)業(yè)舉行了一場(chǎng)辯論，請(qǐng)結(jié)合討論的結(jié)果，寫一篇支持有機(jī)農(nóng)業(yè)的英語作文，內(nèi)容包括：1.化學(xué)農(nóng)業(yè)的危害2.有機(jī)農(nóng)業(yè)的優(yōu)點(diǎn)及理由3.做出總結(jié)注意：1.寫作詞數(shù)應(yīng)為80左右

2.可以適當(dāng)增加細(xì)節(jié)，以使行文連貫。DiscussionWhatadvantagesanddisadvantagesdoorganicandchemicalfarminghave?chemicalfarmingorganicfarmingadvantagesdisadvantagesfightcropdiseaseincreaseproductionlowercostcropslookbeautifuloutside......goodfoodavoidingdamagetotheenvironmentortopeople'shealth......harmthelandharmpeople’shealthharmtheenvironmentcropsarelessinnutrition......cannotmeetthedemandforfoodmoreeffortsandhighercostsmellygases......Learningforthelanguage1.最近我們討論了要不要發(fā)展有機(jī)農(nóng)業(yè)?？捶ㄒ蛉硕?。反方觀點(diǎn)及理由2.很明顯，使用化肥有很多缺點(diǎn)。Itisobviousthatusingchemicalfertilisers_________________________.3.最重要的是，留在作物內(nèi)部的化學(xué)物質(zhì)會(huì)導(dǎo)致癌癥或其他疾病。Aboveall,thechemicalsstayinginsidethecrops_______________________________________________.4.這些蔬菜長(zhǎng)得很快，幾乎沒有什么營(yíng)養(yǎng)。Thevegetables________________________________________.Recently________________________________________organicagriculture.________________________________.weheldadiscussionaboutwhethertodevelopOpinionsvaryfrompersontopersonhasmanydisadvantagescanleadtocancerorotherillnessesgrowsofastthattheycontainlittlenutritionLearningforthelanguage正方觀點(diǎn)及理由1.隨著人們?cè)絹碓礁辉?，他們非常重視健康。Aspeoplearebecomingricher,____________________________________.2.有機(jī)農(nóng)產(chǎn)品只需使用天然肥料，使蔬菜和水果既美味又有營(yíng)養(yǎng)。Organicproducesimplyusesnaturalfertilisers,____________________________andnutritive.3.這種產(chǎn)品生長(zhǎng)在干凈的水中，從不使用農(nóng)藥，這對(duì)我們的健康有益。Theproducegrowsincleanwaterandneverusespesticides,___________________________________________.健康是第一財(cái)富，所以選擇有機(jī)食品更明智。theyattachgreatimportancetohealth.makingvegetablesandfruittastywhichisbeneficialtoourhealthHealthisthefirstwealth,soitiswisertochooseorganicfood.添加標(biāo)題Writeyourownessay我們班關(guān)于有機(jī)農(nóng)業(yè)和化學(xué)農(nóng)業(yè)舉行了一場(chǎng)辯論，請(qǐng)結(jié)合討論的結(jié)果，寫一篇支持有機(jī)農(nóng)業(yè)的英語作文，內(nèi)容包括：1.化學(xué)農(nóng)業(yè)的危害2.有機(jī)農(nóng)業(yè)的優(yōu)點(diǎn)及理由3.做出總結(jié)注意：1.寫作詞數(shù)應(yīng)為80左右

2.可以適當(dāng)增加細(xì)節(jié)，以使行文連貫。HomeworkUsefulsentencepatternsExpressyouropinions:Inmyopinion,____farmingispreferableto_____farming.There