It is demonstrated by the numerical evaluations that Dresselhaus spin-orbit coupling eliminates the spin degeneracy and leads to the splitting of asymmetric Fano-type resonance peaks in the conductivity. 数值计算结果表明Dresselhaus自旋轨道耦合不仅可以消除自旋简并,而且可以导致不对称Fano共振电导峰的劈裂。