Oneneversees____ingredientsbeingadvertisedonTV. It'snevera____orapeach.
查看答案
Butanumberofscientists______ theassumptionthatthepresenceofalienspeciescanneverbe_______ inanaturalecosystem.
Cafescertainlyareavery_______ marketsector.Therearemorethan______ inourcity,andwefelttheyareallrathersimilartoeachother.
若一颗满二叉树有n个结点,深度为h,则下面关系正确的是()
A. n=h+m
B. n=2^h-1
C. m=n/2
D. n=m+1
已知某二叉树的先序遍历序列为cedba,中序遍历序列为debac,则它的后序遍历序列为()
A. acbde
B. dabce
C. deabc
D. decab