S24G7 根號序列的探究 0:介紹

Title:
S24G7 根號序列的探究 0:介紹
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01:05
anchiang chu added a video: S24G7 根號序列的探究 0:介紹
http://www.youtube.com/watch?v=q8NsK-OPMIY
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Added   by anchiang chu
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