1.悬挂在竖直方�上的弹簧振子�期为2 S从最低点的位置�上运动时开始计时它的振动图象如图14所示由图可知 图14 A.t=1 Template




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tomski1.悬挂在竖直方�上的弹簧振子�期为2 s从最低点的位置�上运动时开始计时它的振动图象如图14所示由图可知 图14 coloring