关于声音的说法正确的是 A声音是靠物体的振动产生的 B声音在固体液体中比在气体中传播的慢 C声音在真空中的传播速度是340ms D Template




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tomski关于声音的说法正确的是 a声音是靠物体的振动产生的 b声音在固体液体中比在气体中传播的慢 coloring