如图所示为一列沿x轴正方�传播的机械波在某一时刻的图象由图可知这列波的振幅a波长λ和x=l米处质点的速度方�分别为 A.a=o4 Template




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tomski如图所示为一列沿x轴正方�传播的机械波在某一时刻的图象由图可知这列波的振幅a波长λ和x=l米处质点的速度方�分别为 a.a=o4 coloring