如图所示在教室里小明敲响乙音叉时与甲音叉的叉股接触的乒乓球会弹起来这一现象既可以说明�声的物体在振动振动也能说明声音可以在空气空气中 Template




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tomski如图所示在教室里小明敲响乙音叉时与甲音叉的叉股接触的乒乓球会弹起来这一现象既可以说明�声的物体在振动振动也能说明声音可以在空气空气中 coloring