下列关于声现象的说法中正确的是 A�们听到的上课铃声是由铃的振动产生的b太空行走的宇航�之间可以直接对话c噪声�测装置可以防止噪声 Template




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tomski下列关于声现象的说法中正确的是 a�们听到的上课铃声是由铃的振动产生的b太空行走的宇航�之间可以直接对话c噪声�测装置可以防止噪声 coloring