The door and the windows were all closed and there was no _____ of forced entry.   [ ]

A. scene              

B. signal              

C. sign              

D. sight

设有字符序列(Q，H，C，Y，P，A，M，S，R，D，F，X)，问新序列(F， H，C，D，P，A，M，Q，R，S，Y，X)是下列哪一个排序算法的一趟扫描的结果

A．起泡排序

B．初始步长为4的希尔排序

C．二路归并排序

D．以第一元素为分析的快速排序