【单选题】29 / 61当x<2a′x < 2a'x<2a′时,MuM_uMu按?AMu=fyAs(h0−a′)M_u = f_y A_s(h_0 - a')Mu=fyAs(h0−a′)正确BMu=fyAsh0M_u = f_y A_s h_0Mu=fyAsh0CMu=α1fcbh0M_u = \alpha_1 f_c b h_0Mu=α1fcbh0D无法计算参考答案A参考解析Mu=fyAs(h0-a')。