Butanumberofscientists______ theassumptionthatthepresenceofalienspeciescanneverbe_______ inanaturalecosystem.
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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
传感器能感知的输入变化量越小, 表示传感器的()
A. 线性度越好
B. 迟滞性越小
C. 重复性越好
D. 分辨率越高