• 2022-06-03
    圆心在x轴上,半径为2,且过原点的圆的标准方程是( )
    A: [img=134x27]18038de95f03cc4.png[/img]
    B: [img=134x27]18038de967e310b.png[/img]
    C: [img=274x27]18038de975c194f.png[/img]
    D: [img=273x27]18038de97eaf14f.png[/img]