1.如图5 13所示劲度系数为k1的轻质弹簧两端分别与质量m1和m2的物体12栓接劲度系数为k2的轻质弹簧上端与物体2栓接下端压在地面 Template




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tomski1.如图5 13所示劲度系数为k1的轻质弹簧两端分别与质量m1和m2的物体12栓接劲度系数为k2的轻质弹簧上端与物体2栓接下端压在地面 coloring