5.图2所示物体从某一高度落下落在直立于地面的弹簧上在a点物体开始接触弹簧到b点时物体速度为零然后被弹回不计空气阻力以下说法正确 Template




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tomski5.图2所示物体从某一高度落下落在直立于地面的弹簧上在a点物体开始接触弹簧到b点时物体速度为零然后被弹回不计空气阻力以下说法正确 coloring