• 2022-06-06
    下列矩阵为简化阶梯形的是( ).‎‎ ‎
    A: [img=111x63]1802ce6932d5ce4.png[/img]
    B: [img=125x65]1802ce693aaa691.png[/img]
    C: [img=164x65]1802ce6946989ed.png[/img]
    D: [img=153x85]1802ce695189c13.png[/img]