设D=<V, E>为有向图,V={a, b, c, d, e, f }, E={<a,b>, <b,c>, <a,d>, <d,e>,<f,e>},G是 设D=为有向图,V={a, b, c, d, e, f }, E={, , , ,},G是 发布时间:2024-08-22 15:35:19