这不是很简单吗？OE上取一点E’, 使AO=OE’, 连BE’, 则有BE’垂直于AB, 即E’和E重合

来源: 万斤油于 2022-05-06 16:34:55 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

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