第17题: [单项选择]Which of the following is true about memory A. It helps us perceive things happening around us every day. B. It is based on the decisions we made in the past. C. It is rooted in our past habits and skills. D. It connects our past experiences with the present. 参考答案:D 答案解析:细节判断题 依据为第一段第三行“... are to be found in our past experiences,which are brought into the present by m
第20题: [单项选择]算法分析的目的是( )。 A. 找出数据结构的合理性 B. 找出算法中输入和输出之间的关系 C. 分析算法的易懂性和可靠性 D. 分析算法的效率以求改进 参考答案:D 答案解析:算法分析是指对一个算法的运行时间和占用空间做定量的分析,一般计算出相应的数量级,常用时间复杂度和空间复杂度表示。分析算法的目的就是要降低算法的时间复杂度和空间复杂度,提高算法的执行效率。