GRE
The number of sequences in S in which f, b, h, and g appear consecutively in that order
The number of sequences in T in which f and b appear consecutively in that order
The number of different 2-member subsets of a set of 5 members
The number of different 3-member subsets of a set of 5 members
The length of line segment AC
The length of line segment BE
$$k$$
$$m$$
25000 +道题目
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