左岸的陽光
13 years ago
數學寫一寫放棄 = = 我已經脫離圓內角很久了....見鬼了還有排列組合!!!!!!!!!!!
掰噗~
13 years ago
原來如此 (thinking)
小圓♪
13 years ago
題目無奇不有XDDDDD
左岸的陽光
13 years ago
circle5312: 我都無奈了
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