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单项选择题
A.front=front->next
B.rear=rear->next
C.rear=front->next
D.front=rear->next
单项选择题
A.rear%n= = front
B.front+l= rear
C.rear= = front
D.(rear+l)%n= front
单项选择题
A.rear%n= = front
B.(front+l)%n= = rear
C.rear%n -1= = front
D.(rear+l)%n= = front