关于声音下列说法正确的是 A.物体�声一定是因为物体在振动b.�们听不到声音一定是因为物体不振动c.物体振动�率越高�们听到的声音越大d Template




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tomski关于声音下列说法正确的是 a.物体�声一定是因为物体在振动b.�们听不到声音一定是因为物体不振动c.物体振动�率越高�们听到的声音越大d coloring