• 2022-07-26
    图示阴影截面对z轴的惯性矩 [img=14x22]1803de009f9c9b2.png[/img]等于( )。[img=208x241]1803de00aa142a8.png[/img]
    A: [img=162x45]1803de00b490dc2.png[/img]
    B: [img=171x45]1803de00bf87366.png[/img]
    C: [img=171x45]1803de00cb06bae.png[/img]
    D: [img=162x45]1803de00d68d4f2.png[/img]
  • 举一反三