Dim a(3, 3) As Integer

 For m = 1 To 3

 For n = 1 To 3

   a(m, n)=(m-1)*3+n

 Next n

 Next m

   For m = 2 To 3

For n = 1 To 2

   Print a(n, m);

Next n

Next m

运行后输出结果是（  ）

c = 1: s = 10

Do While c <= s

    For i = s To c + 1 Step -1
        If      Then

            t = a(i - 1): a(i - 1) = a(i): a(i) = t
        End If

    Next i
    For i=

        If     Then

            t = a(i + 1): a(i + 1) = a(i): a(i) = t
        End If

    Next i

    c = c + 1
    s = s - 1

Loop

上述程序段三个方框处的语句分别为（  ）

Dim a(1 To 10) As Integer

a(1)=2: a(2)=18: a(3)=10: a(4)=34: a(5)=16

a(6)=7: a(7)=37: a(8)=6: a(9)=15: a(10)=15

c=0: x=0: t= 1

For i=1 To 10

    a(i)=a(i)*t

    c=c+a(i)

    If c>0 Then x=x+1

    t=-t

Next i

Text1.Text=Str(x)

则程序运行后Text1中显示（  ）