unit19modernagriculturereading新教材课件
日期:2010-10-12 10:35
Whatelsedoesagriculturedependonbesidesclimate?waterlandclimatesunshineCarbondioxidewateroxygenphotosynthesisReadingReading:1InchinaonlysevenpercentofthelandisusedforfarmingThisis______Abecausefarmersdon’tneedmorelandtoproducefoodforthewholepopulationBbecauseChinaneedsmoreandmorelandtobuildcitiesCbecausetherearenotenoughfarmerstoworkonthelandDbecausetheotherlandcannotbeusedforagriculture2Fertilisationisatechniquethatisusedtomakepoorsoilbettermakewetlanddriermakedrylandwettergrowvegetableswiththeirrootsinwaterinsteadofearth3ModernagriculturemeansfindingwaystoAincreaseirrigationandstopusingfertilisersBstopirrigationandusingfertilisersCincreaseproductionandbefriendlytotheenvironmentDproducethesameamountwhiletakingbettercareofnature4Inthesentence“…theyareprotectedfromthewind,rainandinsects”,“they”meansAGreenhouseBrootsCVegetablesDtomatoes5InGM“M”,
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