高一十九单元复习课课件
日期：2010-01-02 01:25
Chinesescientistsgrowvegetablesin__________The_______ofthesevegetablesarenotplantedinearthbut_______inwaterthat________allthenutrientsthey______togrowIn1993，Unit19The6thperiodRevisionReadthetextagainandfilltheblanks:ChinahasalonghistoryofagricultureButforalongtime，scientistsstartedto________newtechniquestoincreaseagriculturalproductionwithoutharmingthe______________Sonotonlyfoodproductionisimportantbutalso______________oftheenvironmentThebiggestproblemofChinesefarmersisthe________of_______landUsingthe________technologies，moreadvancedtechnical_____________wasbroughtinfromabroadFromtheearly1990s，traditionalagriculturedidnot_______muchInChina，manyfarmingtechniqueshavebeen____________Inthe1980s，only_______________oflandcanbeusedforfarmingOvertime，akindoftomatowas__________thatwasverydifferentfromany______beforeItwasdeveloped___________atechniqueknownasGMshortagearablelatestgreenhousesrootshangcontainsneeddevelopedgrownusingchangesevenpercentmodernisedinformationdevelopenvironmenttakingcare，
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