Dim a(l To 100) As String

Private Sub Commandl_Click()

  Dim c As Integer, t As String, ans As String

  s = Textl. Text

  k = Val(Text2. Text)

  ans =“”

  For i = 1 To Len(s) - k - 1

    c = c + 1

    a(c) = Mid(s, i, 1) + Mid(s, i + k + 1, 1)

    If check(c) Then

      ans = ans + a(c) + "，"

    Else

      c = c - 1

    End If

  Next i

  Text3. Text = ans

End Sub

Function check(k As Integer) As Boolean

  Dim i As Integer

  check = True

  For i = 1 To k - 1

    If a(i) = a(k) Then check = False: Exit For

  Next i

End Function

若该程序段执行后，在文本框Text1中输入的字符串长度不超过10，文本框Text2中输入的值在0到8范围内（输入输出都不包括双引号本身），下列说法不正确的是（  ）

实现上述功能的VB程序如下，请在划线处填入合适代码。

Private Sub Command1_Click()

  Dim i As Integer, n As Integer

  Dim x As Single, y As Single, x1 As Single, y1 As Single

  Dim d As Single, min As Single

  Dim s As String, t As String

  s = Text1.Text:   x = 25: y = 35                       'A点坐标

  n = 0: min = -1: t = ""

  For i = 1 To {#blank#}1{#/blank#}

    If Mid(s, i, 1) = "," Then

      n = n + 1

      If {#blank#}2{#/blank#} Then

         x1 = Val(t)

      Else

         y1 = Val(t)

         d = {#blank#}3{#/blank#}

         If min = -1 Then min = d

         If d < min Then min = d

      End If

      t = ""

    Else

      t = t + Mid(s, i, 1)

    End If

  Next i

  Label3.Caption = Str(min)

End Sub

Dim x As Integer，y As Integer

x＝Val(Text1.Text)

If x>200 Then

 y＝5*x

ElseIf x>＝50 Then

 y＝10*x

Else

 y＝4*x

End If

Text2.Text＝Str(y)

若要测试所有分支程序代码是否正确，以下测试数据中，最恰当的一组是（  ）

实现上述功能的VB代码如下，但加框处代码有错，请改正。

Private Sub Command1_Click()

Dim a(1 To 999) As Integer

Dim n As Integer

Dim s As String

For i=1 To 999

 a(i)=0

Next i

n=Val(Text1.Text)

s =“”

Do While n<>1     ‘分解质因子过程并统计质因子出现次数

For i = 2 To n

 Do While n Mod i = 0

  s = s&“  ”&i

  a(i)= a(i)+1

       ‘①

 Loop

Next i

Loop

Label4.Caption =“质因子分解过程:” +s

For j = 2 To 999     ‘判断是不是漂亮数

 If Then      ‘②

  Label1.Caption = “不是漂亮数”

  Exit For

 Else

  Label1.Caption =“漂亮数”

  End If

Next j

For j = 2 To 999     ‘在列表框输出质因数及对应的乘方数

 If a(j)>0 Then

  List1.Additem Str(j)+“ ”+Str(a(j))

 End If

Next j

End Sub

①{#blank#}1{#/blank#} ②{#blank#}2{#/blank#}