7.图示为一列在均匀介质中沿x轴正方�传播的简 谐横波在某时刻的波形图波速为2 Ms则 A.质点p此时刻的振动方�沿y轴负方� b.p点 Template




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tomski7.图示为一列在均匀介质中沿x轴正方�传播的简 谐横波在某时刻的波形图波速为2 ms则 coloring