全国粮食亩产差大了，所以才有粮食亩产跨黄河（400斤），过长江（600/800斤？）

来源: 老生常谈12 于 2020-08-24 19:58:58 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

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