unit19newedition课件
日期：2010-03-05 03:39
作用droughtn干旱diken堤坝，Words:producen产量，sheepandcattleaswellaspoultryTofeedtheseanimals，pig，eggs，fruitandallkindsofgreenvegetables2Howhasagriculturalproducechangedoverthepast20years?Whatdoyouthinkcausethesechanges?ScientistshavedevelopednewtechniquestoincreaseagriculturalproductionwithoutcausingdamagetotheenvironmentScientistsdevelopnewkindsofseeds，moremeatandeggsandsoonPeopleturntheireyestomeat，产物effectn结果，moreandmorepeopleeatlessgrain，pegs，weneedmoregrain，theyneedmorefish，peoplehadnotenoughtoeatandoftendiedofhungerSince1980s，milk，sheepaswellasfishItisthenewtechniquesthatmakeallthispossible3Whateffectsdoyouthinkthechangesineatinghabitswillhaveonagricultureornature?PeopleareeatingmoremeatandmilkThatistosay，影响，排水沟sugarcanen甘蔗Phrases:agriculturalproduce农产品eatinghabits饮食习惯Discussion1Howarepeople’seatinghabitschangingoverthepastfewyears?Whydoyouthinkthishappens?Before1949，bettercows，espec，
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