3.下列关于弹力的说法中正确的是 A.相互接触的物体之间一定存在弹力作用 b.不接触的物体之间也可能存在弹力 c.只有相互接触并产生弹性形变 Template




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tomski3.下列关于弹力的说法中正确的是 a.相互接触的物体之间一定存在弹力作用 b.不接触的物体之间也可能存在弹力 coloring