• 2022-06-14
    两端固定的阶梯杆如图所示,横截面面积A2=2A1,受轴向载荷P后,其轴力图是( )。[img=351x171]180318c42a88631.jpg[/img]
    A: [img=277x118]180318c436e3b43.jpg[/img]
    B: [img=278x118]180318c443ce0c7.jpg[/img]
    C: [img=278x118]180318c44deff10.jpg[/img]
    D: [img=278x118]180318c4585efc9.jpg[/img]