下列给出一棵二叉树，按照对称序法周游二叉树，输出结点序列是
ABDEGCFHI
B. DGEBHIFCA
C. DBGEACHFI
D. ADGEBHIFC
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A．Have met for several time.B．Classmates.C．Don't know each other before.D．Friends.
A. Have met for several time.
B. Classmates.
C. Don't know each other before.
D. Friends.
我国基金监管法规体系以《证券法》为核心。()
A. 正确
B. 错误
双排落地的扣件式钢管外脚手架，必须设置纵横向扫地杆。纵向扫地杆采用直角扣件固定在距底座上皮不大于()mm处的立杆上，横向扫地杆固定在纵向扫地杆的下部。
A. 200
B. 300
C. 350
D. 400
下列给出一棵树，按照后根次序法周游树的结点序列是
ABEFCGDHIJ
BAFEGDCHIJ
C. EFBGCHIJDA
D. EFBGCAHIJD
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