已知地球的半径为地球自转的角速度为地面的重力加速度为在地球表面�射卫星的第一宇宙速度为第三宇宙速度为月地中心间距离为.假设地球上有一 Template




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tomski已知地球的半径为地球自转的角速度为地面的重力加速度为在地球表面�射卫星的第一宇宙速度为第三宇宙速度为月地中心间距离为.假设地球上有一 coloring