這種三角形並不存在於本空間。除非高是5
所有跟帖:
• 對哦,支帳篷那根棍兒彎了 -才迷- ♂ (0 bytes) () 05/19/2016 postreply 12:44:42
• 對哦,支帳篷那根棍兒彎了 -才迷- ♂ (0 bytes) () 05/19/2016 postreply 12:44:42
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