[简答题]{{B}}You just got recovered from illness. Write a note to your partner, Jason, expressing your appreciation to his care and great help.{{/B}}
{{I}} Marks will be awarded for content, organization, grammar and appropriateness.{{/I}}
第7题: [单项选择]待排序的关键码序列为(15,20,9,30,67,65,45,90),要按关键码值递增的顺序排序,采取简单选择排序法,第一趟排序后关键码15被放到第( )个位置。 A. 2 B. 3 C. 4 D. 5 参考答案:A 答案解析:[解析] 选择排序的基本思想是扫描整个线性表,从中选出最小的元素,将它交换到表的最前面,然后对剩下的子表采用同样的方法,直到子表为空。所以第一趟排序后,将选出最小的元素9放在第一个位置,元素15则放在