循环双链表的 p 所指的结点之前插入 s 所指结点的操作是( ) 。
A.p->prior = s;s->next = p;p->prior->next = s;s->prior = p->prior B.p->prior = s;p->prior->next = s;s->next = p;s->prior = p->prior C.s->next = p;s->prior = p->prior;p->prior = s;p->prior->next = s D.s->next = p;s->prior = p->prior;p->prior->next = s;p->prior = s正确答案D
