如图是抛出的铅球运动轨迹的示意图.画出铅球沿这条曲线运动时在abcde各点的速度方�及铅球在各点的受力方�.——青夏教育精英家教�—— Template




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tomski如图是抛出的铅球运动轨迹的示意图.画出铅球沿这条曲线运动时在abcde各点的速度方�及铅球在各点的受力方�.——青夏教育精英家教�—— coloring