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已知点P在圆x2+y2=5上,点Q(0,-1),则线段PQ的中点的轨迹方程是( )A.x2+y2-x=0B.x2+y2-y-1=0C
已知点P在圆x2+y2=5上,点Q(0,-1),则线段PQ的中点的轨迹方程是()A.x2+y2-x=0B.x2+y2-y-1=0C.x2+y2-y-2=0D.x2+y2-...
已知点P在圆x2+y2=5上,点Q(0,-1),则线段PQ的中点的轨迹方程是( )A.x2+y2-x=0B.x2+y2-y-1=0C.x2+y2-y-2=0D.x2+y2-x+y=0
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