高中英语 Unit 2 Working the land Period 4 Using Language课件 新人教版必修4.ppt

unit2workingtheland usinglanguage 2 3 1 masterthefollowingnewwords phrasesandsentencesinusinglanguageproduction bacteria pest nutrition discovery soil rootregret reduce regretbuildup keep freefrom leadto focuson inadditionsomeorganicfarmerspreferplantinggrassbetweencropstopreventwindorwaterfromcarryingawaythesoil 2 learntheadvantagesoforganicfarming 本课首先观看嘉世有机农业视频 引出本节题目 化学耕作还是农业耕作 进而讨论化学耕作和有机耕作的概念 化学耕作的弊端是什么 为什么农民转而开始有机耕作 有机耕作通过什么方法来保持土地的肥沃 然后让学生听课文录音 了解短文的主旨以及各段的大意 最后讲解短文的语言点 最后通过改写的短文加深对本文的了解 讲解农业耕作是配有相关的视频 有助于学生理解 总结概括文章和段落大意 提高学生的理解和表达能力 听课文录音有助于学生听力水平的提高 reading chemicalororganicfarming whatcanweharvest nopains nogains addfertilizerintothesoil howcanfarmersmaketheplantsgrowwell howmanykindsoffertilizersdofarmersuse naturalfertilizerorganicfarming chemicalfertilizerchemicalfarming twokinds discussion whichkindoffarmingisbetter better let slearnmoreaboutchemicalandorganicfarming listentothetapecarefully organicfarmingisbecomingmorepopular themainideaofthetext fastreading long termuseofchemicalfertilizerscancausedamagetothelandandpeople shealth problemscausedbychemicalfertilizers themainideaofeachparagraph p1 p2 farmersandcustomersturntoorganicfarming othermethodstokeepthesoilfertile p3 p4 carefulreading whyarechemicalfertilizerssopopularinfarmingtoday becausetheyarecheap theyareagoodwaytostopcropdiseaseandincreaseproduction theycancausedamagetotheland theydogoodtopeople shealth paragraphi chemicalfarming stopcropdiseaseincreaseproduction damagetheland bykillingthehelpfulbacteriaandpestsaswellastheharmfulones affectcrops bystayinginthegroundandundergroundwaterforalongtime leadtocancer illnesses bybuildingupinpeople sbodiesovertime havelessnutrition bygrowingtoofast paragraph2 organicfarming naturalwastefromanimals makethesoilricherinmineralsandmorefertile ahealthysoil reducediseasesincrops helpcropsgrowstrongandhealthy paragraph3 organicfarming usenaturalwaste makethesoilrichinminerals changethecrop putmineralsbackintosoil making plantcropswithdifferentroots usedifferentlevelsofland plantgrassbetweencrops prevent from anaturalfertilizer paragraph4 1 whichstatementiswrongaccordingtothetext a allcropsareorganic b recently theterm organicfarming hasgainedanothermeaning c allfarmersusefertilizers d scientistsbelievesomechemicalfertilizersarebetterforpeople readagainandchoosethebestanswer d 2 whichisnotthereasonwhyorganicfarmersprefernaturalwastefromanimals a itcankeepthefoodfreefromchemicals b itcankeeptheair soilandwaterfreefromchemicals c itcankillharmfulpests d itcanmakethesoilricherinmineral c 3 whatistheadvantageofusingchemicalfertilizers a leavingchemicalsinthegroundforalongtimeisgoodforwatersupply b theycangetthesoilexhausted c theycankillhelpfulbacteria d theycankillharmfulpest d 4 theorganicfarmersdothefollowingsexcept a addingfertilizerswhichisrichinmineralb changingcropseverytwoorthreeyearsc plantingseedsindifferentlayersofthesoild plantinggrassbetweencropstopreventthesoilfrombeingblownaway a 1 whatis organicfarming answerthequestions itreferstocropsgrowingwithnaturalratherthanchemicalfertilizers 2 whatdoorganicfarmersprefertouseasfertilizer naturalwastefromanimals becausepeasandbeanscanputmineralsbackintothesoil makingitrichandhealthyandreadytogrowmorewheatorcorn 3 whydoorganicfarmersgrowpeasorsoybeansaftercornorwheat 4 whatisthemaingoalforusingorganicfarmingmethods togrowgoodfoodandtoavoiddamagingtheenvironmentorpeople shealth nouseofchemicalfertilizers awayfromindustrialareas awayfromdirtywatersupply noairpollution asummaryoforganicfarming fillintheblanksmanyfarmerswelcome fertilizersbecausetheyaregreatwaytostopcropdiseaseandincrease butthesechemicalcan toillnesses sofarmersbegantoturnto farming they onkeepingtheirsoilrichand ofdisease organicfarmersoftenpreferusing wasteofanimalsasfertilizer thiskeepsthesoilfree chemicals therearemanymethodstokeepthesoil themethodshavethesamegoal togrowgoodfoodandavoiddamagingthe orpeople shealth chemical production focus free natural from fertile environment lead organic 1 thesechemicalsinthefoodsupplybuildupinpeople sbodiesovertime languagepoints hardworkingconditionsbuildupcharacter buildup增强 建立 开发 艰苦的工作条件能磨练人的性格 2 manyofthesechemicalscanleadtocancerorotherillnesses allroadsleadtorome leadto导致 造成 条条大道通罗马 3 theyfocusonkeepingtheirsoilrichandfreeofdisease focuson 集中 注意力 精力等 于 youshouldfocusyourattentiononyourwork 把注意力集中在你的工作上 4 thisalsokeepstheair soil waterandcropsfreefromchemicals 4 youmusttakecaretokeepthewoundfreefromthedirt keeps freefrom of 使 免受 影响 伤害等 使不含 有害物 你必须照顾好伤口 免受灰尘的伤害 5 reducev 减少 降低e g 公司尽力通过减少花销来提高利润 thecompanytriestoincreaseprofitsby 今年我们已经减少了业务开支 we expensesthisyear reducingcosts havereduced expressions 1 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 8 集中 注意力 精力 于9 每隔几年10 避免做 chemicalfertilizerscause dodamagetowashoffleadtobuildupinaddition to keep freefrom offocusoneveryfewyearsavoiddoing exercises washoff leadto buildup inaddition to keep freefrom of focuson avoiddoing 1 hismistakes hisfailure 2 thesechemicalsinthefoodsupply inpeople sbodiesovertime 3 allroads rome 4 please yourmind thefollowingproblem 5 childrenshould violen