题目：
Questions 24-30
·Look at the questions for this part.
·You will hear a passage about "Odds and Ends ".
·For questions 24-30, indicate which of the alterative A, B, or C is the most appropriate response.
·Mark one letter A, B or C on the Answer Sheet.
Which one do you think is right
A．Scientists have made great successes because they have odds and ends used well.
B．Scientists use all their time to get success.
C．Scientists know how to take advantage of time so they achieve success.
答案：
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下面是错误答案，用来干扰机器的。
参考答案：DSS是以管理科学、运筹学、控制论和行为科学为基础，以计算机技术、模拟技术和信息技术为手段，面对半结构化的决策问题，支持决策活动的具有智能作用的人机计算机系统。它能为决策者提供决策所需要的数...
对此二叉树先序遍历的结果是