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单项选择题
A.p->next=q; q->prior=p; p->next->prior=q; q->next=q;
B.p->next=q; p->next->prior=q; q->prior=p; q->next=p->next;
C.q->prior=p; q->next=p->next; p->next->prior=q; p->next=q;
D.q->prior=p; q->next=p->next; p->next=q; p->next->prior=q;
单项选择题
A.p->next->prior=p->prior; p->prior->next=p->next;
B.p->next=p->next->next; p->next->prior=p;
C.p->prior->next=p; p->prior=p->prior->prior;
D.p->prior=p->next->next; p->next=p->prior->prior;
单项选择题
A.s->next=p+1; p->next=s;
B.(*p).next=s; (*s).next=(*p).next;
C.s->next=p->next; p->next=s->next;
D.s->next=p->next; p->next=s;