Dear sportwoman, ur too cute. It's ok to look up the answer.

来源: 环绕自然 于 2014-02-24 00:02:39 [] [博客] [旧帖] [给我悄悄话] 阅读数 : (622 bytes)
本帖于 2014-02-27 21:50:21 时间, 由普通用户 冲浪潜水员 编辑

Dear 小曼，你太cute 了.
This is just a little mind teaser. Please feel free to look up the answer from the
previous 跟贴。It’s ok, if we are not math expert. 是吧？

Best regards!

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