• 2022-06-30
    图示刚架A截面弯矩为()[img=157x120]1803a1ec1ca79ae.jpg[/img]
    A: Fl/2(左侧受拉)
    B: Fl/4(左侧受拉)
    C: Fl/4(右侧受拉)
    D: Fl/2(右侧受拉)