关于声现象下列说法正确的是 A.声音是由物体的振动产生的b.人类能听到的声叫声音超声波和次声波也是声音c.人听到声音是否响亮只跟�生体 Template




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tomski关于声现象下列说法正确的是 a.声音是由物体的振动产生的b.人类能听到的声叫声音超声波和次声波也是声音c.人听到声音是否响亮只跟�生体 coloring