主要是失去山区屏障，使宋朝处于被动挨打的态势, 使敌国居高临下进可攻退可守。

来源: 老生常谈12 于 2021-05-08 06:50:33 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

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