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[声学基础] 声音大小强弱与声音高低的区别 |
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发表于 2007-9-27 08:26
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发表于 2007-9-27 09:34
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发表于 2007-9-27 10:04
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音响音量
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发表于 2007-9-28 09:02
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发表于 2007-10-8 19:42
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发表于 2008-1-7 22:31
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发表于 2008-1-8 11:04
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