必修4 Unit2 Chemical or organic farming(上课)

ChemicalOrOrganicFarming?,chemicalproductionbacteriapestnutritionmineraldiscovery,adj.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,focussoilreducerootskimunderlinesummarycomment,n.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.做出评论,buildupleadtofocusonkeepfreefrom/of,逐渐增强;建立;开发导致;通向通往集中(注意力,精力等)于使免受(影响,伤害等)；使不含(有害物),1.Haveyoueverbeentothecountryside?2.Doyouknowhowtoworkonafarm?,Step1:warmingup,LetsgototheQQhappyfarm!,First,buytheseedsfromthestore.,Second,weneedtoplow（犁田）orturnoverthesoil.,Third,wesow（播种）theseedsinthesoil.,Finally,wecanhaveaharvest.,toimprovetheoutputofthecrops,fertilizer,waterthecrop,ridthesoiloftheweed,fertilizethesoil,killoffthepest,toimprovetheoutputofthecrop,fertilizer,Howmanykindsoffertilizersdofarmersuse?Therearetwokinds.Theyarechemicalfertilizersandnaturalones.,chemicalfertilizersnaturalfertilizers,ChemicalOrOrganicFarming?,Reading,Task1Listening（3mins）,Findoutthemainideaofthesefourparagraphs.,Long-termuseofchemicalfertilizerscancausedamagetothelandandpeopleshealth.,Problemscausedbychemicalfertilizers.,P1.,P2.,Farmersandcustomersturntoorganicfarming.,Othermethodstokeepthesoilfertile.,P3.,P4.,chemicalfertilizers,Whyarechemicalfertilizerssocommoninfarmingtoday?,Manyfarmerswelcomedthemasagreatwaytostopcropdiseaseandincreaseproduction.,Paragraph1,2.Afterthelong-termuseofchemicalfertilizers,whathavescientistsfound?,Long-termuseofchemicalfertilizerscancausedamagetothelandand,evenmoredangerous,topeopleshealth.,Paragraph2,theydamagethe_,killingthe_bacteriaandpestsaswellasthe_ones,Chemicalsstayinthe_and_waterfora_time,thisaffects_,_and_,fruit,vegetablesandotherfoodgrowntoo_;theylookso_,notbefullofnutrition;more_thanvitaminsandminerals,land,helpful,harmful,ground,underground,long,crops,animals,humans,fast,beautiful,water,Paragraph31.Somefarmersandmanycustomersbegintoturntochemicalfarming.2.Organicfarmingissimplyfarmingwithoutusinganyfertilizer.3.Organicfarmerspreferusingnaturalwastefromanimalsasfertilizers.,F,F,T,Paragraph3and4,Thewaystokeepthesoilfertile.,usingnaturalwastefromanimalsasfertilizer,changingthekindofcropineachfield,plantingcropstousedifferentlevelsofsoil,plantinggrassbetweencropstopreventwindandwaterfromcarryingawaythesoil,Inrecentdays,scientistshavediscoveredthatusing_fertilizersforalongtimecanhurtthelandandalsopeoples_.Thereareseveral_causedbychemicalfertilizers.Theyhurtthehealthoftheland,_inthewaterforalongtimeandgetintopeoples_throughtheirfood.,chemical,bodies,problems,health,stay,Summary,_farmingisbecomingmorepopular.Somefarmersandmany_turntoit.Organicfarmingdoesnotuseanychemicals.,Organic,customers,Discussion,Ifyouarealandowner,youwanttogrowsomekindsofcrops,whatwillyoudo?,Willyouuseanyfertilizertoimprovetheproduction?Why?,LanguagePoints,buildup增强;建立;开发Hardworkingconditionsbuildupcharacter.Doingregularexercisecanbuildupmyhealth.,Manyofthesechemicalscanleadtocancerorotherillnesses.1.Toomuchworkandtoolittlerestoftenleadtoillness.2.AllroadsleadtoRome.3.Waronlyleadstoviolence.,Theyfocusonkeepingtheirsoilrichandfreeofdisease.Youshouldfocusyourattentiononyourwork.Weshouldfocusourenergyonourcustomersneeds.,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,Thisalsokeepstheair,soil,waterandcropsfreefromchemicals.1.Weputourbooksinth