A.(rear-front+m)%m B.read-front+1 C.read-front-1 D.read-front
A.EAFCBD B.EFACDB C.EABCFD D.EACBDF
A.B-樹(shù) B.B+樹(shù) C.豐滿樹(shù) D.穿線樹(shù)
A.100 B.200 C.300 D.400