在树形结构中，一个节点的子树的个数叫做节点的
A．高度
B．层数
C．度
D．分支个数
参考答案：C
解析：[命题目的] 本题考查了节点的度的定义。[解题要点] 节点的度是指一个节点的子树的个数。树的高度是指一棵树的叶节点的最大层数。节点的层数，根节点的层数为0，其它任何节点的层数等于它的双亲节点的层数加1。[考点链接] 掌握树的高度、节点的层数的定义，并能够区别节点的度、树的高度、节点的层数。
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| My name is Philip. Now I live in China. 1 Sunday my father often 2 me to the movies (电影). My favorite movies 3 action movies. My father likes 4 , too. Many young 5 like this kind of movies, 6 they're exciting. My good 7 friend, Jim, likes swimming best. I like swimming best, too. We 8 swimming is very interesting. 9 school, I like playing basketball with my classmates on the playground. In my spare time, I often draw 10 with my good friends in the park. | ||||
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