皮球从手中竖直落到地上从撞击地面到�生形变的过程中 A.弹性势能转化为动能b.动能转化为弹性势能c.重力势能转化为弹性势能d.动能转化为 Template




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tomski皮球从手中竖直落到地上从撞击地面到�生形变的过程中 a.弹性势能转化为动能b.动能转化为弹性势能c.重力势能转化为弹性势能d.动能转化为 coloring