假定城镇是唯一市场城镇�围是条件均一的平原种植农作物的收益只与市场价格生产成本和运费有关其关系表达式为收益=市场价格 生产成本 运费 Template




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tomski假定城镇是唯一市场城镇�围是条件均一的平原种植农作物的收益只与市场价格生产成本和运费有关其关系表达式为收益=市场价格 生产成本 运费 coloring