一列简谐横波 某时刻的波形图象如图甲所示 从该时刻开始计时 波上a质点的振动图象如图乙所示 则 . a 这列波的波速是25ms Template




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tomski一列简谐横波 某时刻的波形图象如图甲所示 从该时刻开始计时 coloring