• 2022-06-19
    以 [img=170x30]18031bad4957108.png[/img] 为通解的二阶线性微分方程是
    A: [img=189x26]18031bad51a66bc.png[/img]
    B: [img=189x26]18031bad59427a7.png[/img]
    C: [img=197x26]18031bad62a752f.png[/img]
    D: [img=197x26]18031bad6b44b57.png[/img]
  • 举一反三