以下关于声音的说法中正确的是 A.声音可以在真空中传播b.声音的传播需要物质物质不同传播速度不同c.振动停止后�声体仍能�生d.声音 Template




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tomski以下关于声音的说法中正确的是 a.声音可以在真空中传播b.声音的传播需要物质物质不同传播速度不同c.振动停止后�声体仍能�生d.声音 coloring