高中英语 Unit 2 Working the land Period 4 Using Language课件 新人教版必修4 课件VIP专享VIP免费

Unit2WorkingthelandUsinglanguage231.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。ReadingCHEMICALORORGANICFARMING?Whatcanweharvest?Nopains,nogains.AddfertilizerintothesoilHowcanfarmersmaketheplantsgrowwell?Howmanykindsoffertilizersdofarmersuse?naturalfertilizerorganicfarmingchemicalfertilizerchemicalfarmingTwokinds.Discussion:Whichkindoffarmingisbetter?BetterLet’slearnmoreaboutchemicalandorganicfarming!Listentothetapecarefully.organicfarmingisbecomingmorepopular.Themainideaofthetext:Long-termuseofchemicalfertilizerscancausedamagetothelandandpeople’shealth.Problemscausedbychemicalfertilizers.ThemainideaofeachparagraphP1.P2.Farmersandcustomersturntoorganicfarming.Othermethodstokeepthesoilfertile.P3.P4.1.Whyarechemicalfertilizerssopopularinfarmingtoday?A.Becausetheyarecheap.B.Theyareagoodwaytostopcropdiseaseandincreaseproduction.C.Theycancausedamagetotheland.D.Theydogoodtopeople’shealth.ParagraphIChemicalfarmingadvantagesproblemscausestopcropdiseaseincreaseproductiondamagethelandbykillingthehelpfulbacteriaandpestsaswellastheharmfulones.affectcropsbystayinginthegroundandundergroundwaterforalongtimeleadtocancer/illnessesbybuildingupinpeople’sbodiesovertimehavelessnutritionbygrowingtoofastParagraph2OrganicfarmingNaturalwastefromanimalsMakethesoilricherinmineralsandmorefertileAhealthysoilReducediseasesincropsHelpcropsgrowstrongandhealthyParagraph3Organicfarmingmethodsadvantagesusenaturalwastemakethesoilrichinmineralschangethecropputmineralsbackintosoil,making…plantcropswithdifferentrootsusedifferentlevelsoflandplantgrassbetweencropsprevent…from…,anaturalfertilizerParagraph41.WhichstatementisWRONGaccordingtothetext?A.Allcropsareorganic.B.Recently,theterm“organicfarming”hasgainedanothermeaning.C.Allfarmersusefertilizers.D.Scientistsbelievesomechemicalfertilizersarebetterforpeople.Readagainandchoosethebestanswer.D2.Whichisnotthereasonwhyorganicfarmersprefernaturalwastefromanimals?A.Itcankeepthefoodfreefromchemicals.B.Itcankeeptheair,soilandwaterfreefromchemicals.C.Itcankillharmfulpests.D.Itcanmakethesoilricherinmineral.C3.Whatistheadvantageofusingchemicalfertilizers?A.Leavingchemicalsinthegroundforalongtimeisgoodforwatersupply.B.Theycangetthesoilexhausted.C.Theycankillhelpfulbacteria.D.Theycankillharmfulpest.D4.Theorganicfarmersdothefollowingsexcept______.A.addingfertilizerswhichisrichinmineralB.changingcropseverytwoorthreeyearsC.plantingseedsindifferentlayersofthesoilD.plantinggrassbetweencropstopreventthesoilfrombeingblownawayA1.Whatis“organicfarming”?Answerthequestions.Itreferstocropsgrowingwithnaturalratherthanchemicalfertilizers.2.Whatdoorganicfarmersprefertouseasfertilizer?Nat...