2020年12月17日，嫦娥五号成功返回地球
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2020年12月17日，嫦娥五号成功返回地球，创造了我国到月球取土的伟大历史。如图所示，嫦娥五号取土后，在P处由圆形轨道Ⅰ变轨到椭圆轨道Ⅱ，以便返回地球。下列说法正确的是( )
A. 嫦娥五号在轨道Ⅰ和Ⅱ运行时均超重
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