关于声音下列说法中正确的是 A.声音在真空中的传播速度最大b.次声波不需要介质就能传播很远c.响度与�声体振动的�率有关d.音调与�声体 Template




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tomski关于声音下列说法中正确的是 a.声音在真空中的传播速度最大b.次声波不需要介质就能传播很远c.响度与�声体振动的�率有关d.音调与�声体 coloring