• 2022-06-06
    已知圆心是(2,-1),半径为2的圆的方程是( )
    A: [img=178x27]1802e7172caf0c3.png[/img]
    B: [img=178x27]1802e71735298c7.png[/img]
    C: [img=178x27]1802e7173ddfe73.png[/img]
    D: [img=178x27]1802e71746a7acc.png[/img]