n=0

  i=1

  j=6

  key=Val(Text1．Text)

  f=False

  Do While i<=j And Not f

    m=(i+j+1)＼2

    n=n+1

    If key=d(m)Then

       f=True

    ElseIf key>d(m)Then

       i=m-1

    Else

      i=m+1

    EndIf

  Loop

数组元素d（1）到d（6）的值依次为“87，72，53，41，29，18”，若该程序段运行结束后，n的值为2，则key的值是（  ）

按钮Command1，则在文本框Text2中显示该金额的大写，程序运行界面如下图所示:

a(1) = 2: a(2) = 2: a(3) = 5: a(4) = 6: a(5) = 7

Key = 2

i = 1: j = 5: flag = False Do While i <= j And Not flag

m = (i + j) \ 2 If Key = a(m) Then

s = "找到第" + Str(m) + "个" flag = True: Exit Do

ElseIf Key < a(m) Then j = m - 1

Else

i = m + 1 End If

s = Str(m) + s Loop Label1.Caption = s

执行该程序段后，在标签 Label1 中显示的内容是（   ）

Dim a(1 To 6)As Integer

Dim i As Integer,j As Integer,Key As Integer,m As Integer

a(1)=11:a(2)=22:a(3)=33: a(4)=44:a(5)=55:a(6)=66

i=1:j=6:p=0:Key=23

Do While i<=j

p=p+1

  m=(i+j)\2

  If j Mod 2=0 Then m=m+1

  If a(m)=Key Then Exit Do

  If Key<a(m) Then j=m-1

Else i=m+1

Loop

a(1) = 11 : a(2) = 14 : a(3) = 23 : a(4) = 23 : a(5) = 30 : a(6) = 42

key = Val(Text1.Text)

L = 1 : R = 6 : x = 0

Randomize

Do while L <= R

    mid = Int(Rnd() * (R-L+1))+ L

    If a(mid) = key Then

        Exit Do

    ElseIf a(mid) > key Then

        R = mid - 1

        x = x - 1

    Else

        L = mid + 1

        x = x + 1

    End If

Loop

If L <= R Then

    Label1.Caption = "查找成功，" + "位置为" + str(mid)

Else

    Label1.Caption = "查找失败"

End If

该程序执行后，在文本框Text1中输入23，则x的值不可能是（  ）