单项选择题

For the root of B_tree of order m,the minimal number of its children is

A．2
B．m/2
C．ém/2ù
D．m
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单项选择题
In the forest corresponding to the following binary tree，how many children does node B have？
A．1
B．2
C．3
D．4
单项选择题
The principle for a stack memory to store data is
A．FIFO
B．FILO
C．random
D．other way
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