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ID:50115223
大小:3.80 MB
页数:36页
时间:2020-03-05
《高中英语(人教版)必修4课件:unit 2 using language.ppt》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、人教课标高一必修4Unit2UsingLanguageChemicalorOrganicFarmingWorkingthelandWhatisthesubstanceweputonthesoilwhichmakescropsgrow?Itisfertilizer.Howmanykindsoffertilizersdofarmersuse?Therearetwokinds.Theyarechemicalfertilizersandnaturalones.zxxkWhichkinddofarmersusewhentheyaredoingorg
2、anicfarming?Doyouknowaboutorganicfarming?ORGANICFARMINGOrganicfarmingissimplyfarmingwithoutusinganychemicals.1.Whyarechemicalfertilizerssopopularinfarmingtoday?I.Readthepassageandanswerthefollowingquestions.Theyareagreatwaytostopcropdiseaseandincreaseproduction.Comprehend
3、ing2.Whatproblemscanbecausedbyusingchemicalfertilizers?Theycandamagethelandbykillinghelpfulbacteriaandpestsandbystayinginthegroundandundergroundwaterforalongtime.Theydamagepeople’shealthbybuildingupintheirbodiesandleadingtocancerorotherillnesses.3.Whatisorganicfarming?Org
4、anicfarmingmeansgrowingcropswithoutusinganychemicals.4.Whatisthemainreasonforusingorganicfarmingmethods?Themainreasonforusingorganicfarmingmethodsistogrowgoodfoodandtoavoiddamagingtheenvironmentorpeople’shealth.II.Readthetextagainandfillintheblanks.ChemicalFarmingAdvantag
5、esStoppingcropdiseaseandincrease__________productionChemicalFarmingDisadvantagesDamagingtheland:killingthehelpful________________Damagingpeople’shealth:◆Manychemicalsinthefoodsupplycanleadtocancerorotherillnesses.◆Foodgrowstoofasttobefullofmuch________.bacteriaandpestsnut
6、ritionOrganicfarming____Togrowgoodfoodandavoiddamagingtheenvironmentorpeople’shealthz/xxkGoalOrganicfarmingMethods◆Using_______wastefromanimalsasfertilizer◆Changing______________ineachfieldeveryfewyears◆Using_____________ofsoiltoplantcrops◆Planting_____betweencropsgrassna
7、turalthekindofcropdifferentlevelsInwhatconditiondoyouthinkgreenfoodgrow?Theadvantagesofgreenfooddirtyairdirtywatersuppliesinindustrialareasmanychemicalfertilizersclean,freshaircleanwatersuppliesawayfromindustrialareasfreeofchemicalfertilizersMainideaofthepassageChemicalfe
8、rtilizerscancausemanyproblems,soorganicfarmingisbecomingmorepopular.ORGANICFARMINGStructureofthe
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