下列关于声现象的说法中正确的是 A声音可以在真空中传播b声音只能在空气中传播c一切正在�声的物体都在振动d任何振动物体�出的声波都 Template




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tomski下列关于声现象的说法中正确的是 a声音可以在真空中传播b声音只能在空气中传播c一切正在�声的物体都在振动d任何振动物体�出的声波都 coloring