【简答题】如图所示的二叉树先序遍历序列是 ,中序遍历序列是 ,后遍历序列是 。
【简答题】如下图所示的二叉树后序遍历序列是【 】。
【单选题】—_______ has your brother been a member of Trailwalker? —Ever since 2005. [ ]
【单选题】---- _________ do you go to the cinema? ---- Hardly ever. I always see movies on TV.
【单选题】– do you go to the movies? – Hardly ever. I always see the films on the Internet.
【判断题】发动机暖机后才能使用尾气分析仪进行尾气检测。
【简答题】工程评估评审技术采用加权平均的公式是 ,其中 O 是乐观值, P 是悲观值, M 是最可能值。
【单选题】—_____ have you ever been to Hongkong? —Only once. [ ]