还有，中国历史这么悠久，为什么解放前农业生产还几乎和汉朝一样的水平，生产工具几乎没有改变？

来源: speedingticket 于 2022-05-29 18:07:51 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

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