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- 问题详情： 36Ifyouaregrowingtomatoesinyourbackyardforsaleyouareproducingforthemarket．Youmightsellsometoyourneighborandsometothelocalmanagerofthesupermarket．Butineithercase，youareproducingforthemarket．37Ifpeoplestopbuyingtomatoes，youwillstopproducingthe...
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