第13题: [单项选择]一棵有16个结点的完全二叉树,对它按从上到下,从左至右给结点编号,则对于编号为7的结点X,它的父结点及右子结点的编号分别为 A. 2,14 B. 2,15 C. 3,14 D. 3,15 参考答案:D 答案解析:[分析] 根据完全二叉树性质6,按从上到下,从左至右给结点编号,若k>1,则父结点编号为 INT(k/2),所以第7号结点的父结点编号是3。若 2k≤n,则编号为k的左子结点编号为2k;否则该结点无左
第24题: [单项选择]Questions 11 to 18 are based on the conversation you have just heard. A. She wants to see the man immediately. B. She isn’t sure which train she’ll be on. C. It takes an hour to get there by train. D. She’ll leave the railway station at 6:30. 参考答案:B 答案解析:[听力原文] M: It says here the next train is due in at 6:30. W: I know, but I don’t know whether I