這不是很簡單嗎?OE上取一點E’, 使AO=OE’, 連BE’, 則有BE’垂直於AB, 即E’和E重合
所有跟帖:
• 嗯。那這個題其實很簡單了。 -wxcfan123- ♂ (0 bytes) () 05/06/2022 postreply 19:54:42
• 嗯。那這個題其實很簡單了。 -wxcfan123- ♂ (0 bytes) () 05/06/2022 postreply 19:54:42
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