题目
A.p -> prior = q;q-> next=p;p -> prior ->next=q; q ->prior= p -> prior;
B.q ->prior= p -> prior;p -> prior ->next=q;q-> next=p;p -> prior = q->next;
C.q-> next=p;p -> next=q;q-> prior ->next= q;q-> next=p;
D.p -> prior ->next=q;q-> next=p;q -> prior = p->prior;p -> prior = q;
第1题
A.p -> prior = q;q-> next=p;p -> prior ->next=q; q ->prior= p -> prior;
B.q ->prior= p -> prior;p -> prior ->next=q;q-> next=p;p -> prior = q->next;
C.q-> next=p;p -> next=q;q-> prior ->next= q;q-> next=p;
D.p -> prior ->next=q;q-> next=p;q -> prior = p->prior;p -> prior = q;
第2题
A.p -> prior = q;q-> next=p;p -> prior ->next=q; q ->prior= p -> prior;
B.q ->prior= p -> prior;p -> prior ->next=q;q-> next=p;p -> prior = q->next;
C.q-> next=p;p -> next=q;q-> prior ->next= q;q-> next=p;
D.p -> prior ->next=q;q-> next=p;q -> prior = p->prior;p -> prior = q;
第3题
A.p->prior=q; q->next=p; p->prior->next=q; q->prior=p->prior;
B.q->prior=p->prior; p->prior->next=q; q->next=p; p->prior=q->next;
C.q->next=p; p->next=q; q->prior->next=q; q->next=p;
D.p->prior->next=q; q->next=p; q->prior=p->prior; p->prior=q;
第4题
A.p->prior=q; q->next=p; p->prior->next=q; q->prior=p->prior;
B.q->prior=p->prior; p->prior->next=q; q->next=p; p->prior=q->next;
C.q->next=p; p->next=q; q->prior->next=q; q->next=p;
D.p->prior->next=q; q->next=p; q->prior=p->prior; p->prior=q;
第5题
A.p->prior=q; q->next=p; p->prior->next=q; q->prior=p->prior;
B.q->prior=p->prior; p->prior->next=q; q->next=p; p->prior=q->next;
C.q->next=p; p->next=q; q->prior->next=q; q->next=p;
D.p->prior->next=q; q->next=p; q->prior=p->prior; p->prior=q;
第6题
A.q->prior = p;p-> next=q;p -> next -> prior =q; q ->next = p -> next;
B.q ->next = p -> next;p -> next -> prior =q;p-> next=q;q->prior = p;
C.p-> next=q;q->prior = p;q ->next = p -> next;p -> next -> prior =q;
D.p -> next -> prior =q;q->prior = p;p-> next=q;q ->next = p -> next;
第7题
A.q->prior = p;p-> next=q;p -> next -> prior =q; q ->next = p -> next;
B.q ->next = p -> next;p -> next -> prior =q;p-> next=q;q->prior = p;
C.p-> next=q;q->prior = p;q ->next = p -> next;p -> next -> prior =q;
D.p -> next -> prior =q;q->prior = p;p-> next=q;q ->next = p -> next;
第8题
A.q->prior = p;p-> next=q;p -> next -> prior =q; q ->next = p -> next;
B.q ->next = p -> next;p -> next -> prior =q;p-> next=q;q->prior = p;
C.p-> next=q;q->prior = p;q ->next = p -> next;p -> next -> prior =q;
D.p -> next -> prior =q;q->prior = p;p-> next=q;q ->next = p -> next;
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