[单选题]A.B.C.D.
[问答题]
[单选题]A.3周B.1天C.1~2周D.1周E.4周
[单选题]A.基数排序B.快速排序C.堆排序D.归并排序
[单选题]A.(4,4)xB.(1,2)xC.(2,3)xD.无法判断