Dr.YuanwasborninBeijingin1930.61hegraduatedfromSouthwes...
问题详情：Dr.YuanwasborninBeijingin1930.61hegraduatedfromSouthwestAgriculturalCollegein1953,hehasgivenhislifeto62(find)waystogrowmoreandmorerice.Asayoungman,hesawthegreatneedforincreasingthericeoutput.A...