• 2022-07-22
    图(a)结构,取图(b)为力法基本体系,则力法方程中的[img=42x25]18038cc22ef3162.jpg[/img]为:[img=480x175]18038cc23959997.jpg[/img]
    A: [img=67x29]18038cc24432fd8.jpg[/img]
    B: [img=62x20]18038cc24f27311.jpg[/img]
    C: [img=25x21]18038cc25a58ba9.jpg[/img]
    D: [img=28x21]18038cc264ecb2e.jpg[/img]