![Dr.YuanwasborninBeijingin1930.61hegraduatedfromSouthwes...]( "Dr.YuanwasborninBeijingin1930.61hegraduatedfromSouthwes...")
- 問題詳情：Dr.YuanwasborninBeijingin1930.61hegraduatedfromSouthwestAgriculturalCollegein1953,hehasgivenhislifeto62(find)waystogrowmoreandmorerice.Asayoungman,hesawthegreatneedforincreasingthericeoutput.Atthattime,faminewas63seriousprobleminmanypartsofth...
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