100个结点的二叉树采用二叉链表存储时，用来指向左、右孩子结点的指针域有_________个。
参考答案：N-1
Which of the following most accurately describes a market structure that has one seller of a specific, well-defined product that has no good substitutes（）
A. Oligopoly.
B. Monopoly.
C. Monopolistic competition.
CT表现为脑基底池增强的炎性病变通常不包括：
A．病毒性
B．化脓性
C．霉菌性
D．脑膜型囊虫病
E．结核性
