C#とD♭の違いって何? - 恐らく、ピアノの鍵盤を考えているから同じだと... - Yahoo!知恵袋 http://detail.chiebukuro.yahoo.co.jp/qa/question_detail/q1064806455 …
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C#とD♭の違いって何? - 恐らく、ピアノの鍵盤を考えているから同じだと... - Yahoo!知恵袋 http://detail.chiebukuro.yahoo.co.jp/qa/question_detail/q1064806455 …