做简谐运动的质点的位移和时间关系曲线如图所示由此可知t=4s时质点的 A.速度为正的最大值加速度为零 b.速度为负的最大值 Template




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tomski做简谐运动的质点的位移和时间关系曲线如图所示由此可知t=4s时质点的 a.速度为正的最大值加速度为零 b.速度为负的最大值 coloring