如图所示在竖直方�上ab两物体通过劲度系数为k的轻质弹簧相连a放在水平地面上bc两物体通过细绳绕过轻质定�轮相连c放在固定的光� Template




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tomski如图所示在竖直方�上ab两物体通过劲度系数为k的轻质弹簧相连a放在水平地面上bc两物体通过细绳绕过轻质定�轮相连c放在固定的光� coloring