Dim a(1 To 1 000)As String

  Dim b(1 To 2)As Integer

  N=Len(Text1．Text)

  For i=1 To n

    a(i)=Mid(Text1．Text，i，1)

  Next i

  DO While n>l

    If ASC(a(n))>=Asc(a(n-1))Then

       m=1

    Else

      m=2

    End If

    b(m)=b(m)+1

    n=n-1

  Loop

数组b各元素的初始值都为0，文本框Text1的内容为“2018Python”。执行程序后，变量b(1)的值为（  ）

Private Sub Command 1_Click()

Dim i As Integer

Dim t As Integer

Dim s As String

i = 1:t = 1:n = Text1.Text

List1.Clear

Do While t< = n

  s = s + “*”

  If i = t Then

  List1.AddItem s

  t = t + 1

  i=0

 End If

i = i + 1

Loop

End Sub

i = 1: j = 8: s = ""

key =Text1.Text

Do While i <= j

  m =(i + j) \ 2

  If key = a(m) Then

   s = s + "M"

   Exit Do

  ElseIf key > a(m) Then

   j = m - 1: s = s + "L"

  Else

   i = m + 1: s = s + "R"

  End If

Loop

Text1.Text = s

数组元素a(1)到a(8)的值依次为“4,22,27,32,35,44,56,59”，该程序段执行后，文本框Text1中显示的内容不可能是（  ）

 s = "Hello World"

 s1 = ""

 n = Len(s)

 For i = 1 To n \ 2

   If Mid(s, i, 1) > Mid(s, n - i + 1, 1) Then

     s1 = s1 + Mid(s, i, 1)

   Else

     s1 = Mid(s, n - i + 1, 1) + s1

   End If

 Next i

 Text1.Text = s1

执行该程序段后，在文本框Text1中显示的是（  ）