I'll give you five! And my lucky 3.:-)
所有跟帖:
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5是3的平方減去
-beautifulwind-
♀
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06/10/2021 postreply
15:14:56
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3=2^2-1^2呀,還真是奇啊!
-忒忒綠-
♂
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06/10/2021 postreply
15:38:00
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哈哈,好玩兒嗎?:)
-beautifulwind-
♀
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06/10/2021 postreply
16:09:50