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[求助贴] 音的高低是一种什么直观的感受?我怎么感觉不到音的高低? |
发表于 2013-4-10 19:56:53
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发表于 2013-4-10 20:00:27
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发表于 2013-4-10 21:31:51
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发表于 2013-4-11 10:02:02
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