A、p->prior->next=p->next; p->next->prior=p->prior
B、p->next->prior=p; p->next=p->next->next
C、p->prior->next=p; p->next=p->next->prior
D、p=p->next; p->prior->next=p->prior
A、p->prior->next=p->next; p->next->prior=p->prior
B、p->next->prior=p; p->next=p->next->next
C、p->prior->next=p; p->next=p->next->prior
D、p=p->next; p->prior->next=p->prior