S0G40 末尾為5的平方數 1:建立正方形

Title:
S0G40 末尾為5的平方數 1:建立正方形
Duration:
02:47
http://www.youtube.com/watch?v=g2QHwrbxNPg
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Added   by anchiang chu
Format: Youtube
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This video is part of Amara Public.