最后这么说是否稍微正规一些：）相似后两底边之比为2:3, 根据等高，从而得三角形BFG面积为12，然后…

来源: 万斤油于 2026-03-24 22:02:15 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

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