人教版高一英语必修四Unit2Usinglanguag

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1、Unit2WorkingthelandUsinglanguageWordspreviewchemicalproductionbacteriapestnutritionmineraldiscoveryadj.化学的;关于化学的n.生产;制造n.细菌n.害虫;害兽;害鸟n.营养;滋养;食物n.矿物;矿石n.发现;发觉focussoilreducerootskimunderlinesummarycommentn.焦点;中心点vt.集中;聚焦n.土壤vt.减少;减缩n.根;根源vt.浏览;略读vt.画底线标出;强调n.总结;摘要;概要n.评论;议论vi.&vt.表达意见;做出评论Ex

2、pressionspreviewbuildupleadtofocusonkeep…freefrom/of逐渐增强;建立;开发导致;造成(后果)集中(注意力,精力等)于使…免受(影响,伤害等)；使…不含(有害物)Itisfertilizer.Whatisthesubstanceweputonthesoiltomakecropsgrow?Howmanykindsoffertilizersdofarmersuse?Therearetwokinds.Theyarechemicalfertilizersandnaturalones.OrganicFarmingchemicalferti

3、lizercowdung用化学肥料和有机肥料的区别:ReadingCHEMICALORORGANICFARMING?Chemicalfertilizerscancausemanyproblems,soorganicfarmingisbecomingmorepopular.Organicfarmingmeansgrowingcropswithnaturalfertilizer.Theorganicfarmerskeepthesoilrichandhealthy.Themainideaofthetext:FastReadingLong-termuseofchemicalferti

4、lizerscancausedamagetothelandandpeople’shealth.Problemscausedbychemicalfertilizers.ThemainideaofeachparagraphP1.P2.Farmersandcustomersturntoorganicfarming.Othermethodstokeepthesoilfertile.P3.P4.ChemicalfertilizerNotgoodforthesoilorthewatersupplyThesoilgetsexhausted.Killbothhelpfulandharmful

5、bacteriaandpestsCarefulReadingChemicalfarmingadvantagesproblemscausestopcropdiseaseincreaseproductiondamagethelandbykilling…affectcropsbystaying…leadtocancer/illnessesbybuildingup…havelessnutritionbygrowingtoofastOrganicfarmingNaturalwastefromanimalsMakethesoilricherinmineralsandmorefertile

6、AhealthysoilReducediseasesincropsHelpcropsgrowstrongandhealthyOrganicfarmingmethodsadvantagesusenaturalwastemakethesoilrichinmineralschangethecropputmineralsbackintosoil,making…plantcropswithdifferentrootsusedifferentlevelsoflandplantgrassbetweencropsprevent…from…,anaturalfertilizerOthermet

7、hods:ChangecropseverytwoorthreeyearsCorn,wheatPeas,soybeansPutthemineralsbackintothesoil,makingitrichandhealthyCropsthatusethesurfaceofthesoil(peanuts)Cropsthatneedadeeperlevelofsoil(rootvegetable)Makesurethatwhatisleftinthegroundafterharvestingbecomesan