unit19warmingup课件
日期：2010-02-09 02:52
farmer，farming，peasantLand，sheepandcattlewereraisedduringtheyearsfrom1986to1990，listeningPeriod1Warming-upandlistening1What’stheunitabout?Canyouguess?AgricultureWhat’stheunitabout?Farm，productionGroupworkWhatdopeopleeatfortheirmealsnow?Whatdidpeopleeatfortheirmealsinthepast?DiscussthechangesineatinghabitLookatthegraph1Whatisthegraphabout?2Whatisshownonthex-axis?3Whatisshownonthey-axis?Lookatthegraphandanswerthefollowingquestions1Whichfarmproductgrewmostduringthefirstfiveyearsofthe1990s?2Howmuchdiditgrowcomparedwiththatduringthesecondhalfofthe1980s?3Whichgrewleast?4Ifthreemillionpigs，soilRice，seasonTechniques，corn，Plants，fishgreenhouseWeather，Period1Warming-up，wheat，animals，howmanywereraisedfrom1991to1995?LookatthegraphanddiscussthefollowingquestionsHowarepeople’seatinghabitschangingovertheyears?Whydoyouthinkthishappens?Howhasagriculturalproducechangedduringtheseyears?Whatdoyouthinkcausedthesechanges?Whateffectsdoyouthinkthechangesineatinghabitswillh，
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