11.下列说法中正确的是 A.一切正在�声的物体都在振动b.只要物体振动就能听到它�出声音c.声音在真空中传播得最快d.声音在固体液体 Template




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tomski11.下列说法中正确的是 a.一切正在�声的物体都在振动b.只要物体振动就能听到它�出声音c.声音在真空中传播得最快d.声音在固体液体 coloring