11.下列实例中在不计空气阻力情况下机械能不守恒的是 A.水平抛出的物体 b.小球落在弹簧上压缩后又被弹起 c.沿光�曲面自由下�的物体 Template




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tomski11.下列实例中在不计空气阻力情况下机械能不守恒的是 a.水平抛出的物体 b.小球落在弹簧上压缩后又被弹起 coloring