一列简谐波沿x轴正方�传播某时刻波形图如图甲所示abcd是波传播方�上的四个振动质点的平衡位置.如再过个�期其中某质点继续振动的 Template




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tomski一列简谐波沿x轴正方�传播某时刻波形图如图甲所示abcd是波传播方�上的四个振动质点的平衡位置.如再过个�期其中某质点继续振动的 coloring