小玲早上7:00到校,11:00放学,她上午在校______小时.
11-7=4(小时);
答:她上午在校4小时.
故答案为:4.
The average manatee is about ten _____long and about _____1,000 pounds.[ ]
A. feet; weighs
B. foot; weigh
C. foots; weighs
D. foots; weigh
在下列的排序方法中,平均时间是O(n2)的是
A.插入排序
B.快速排序
C.堆排序
D.归并排序