某行星沿椭圆轨道运行,远日点离太阳的距离为a,�日点离太阳的距离为b,过远日点时行星的速率为va,则过�日点时的速率为 A.vb=va Template




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tomski某行星沿椭圆轨道运行,远日点离太阳的距离为a,�日点离太阳的距离为b,过远日点时行星的速率为va,则过�日点时的速率为 a.vb=va coloring