实现上述功能的VB程序如下，请回答下列问题：

Dim num As Integer         ‘变量num存储数据库实际的记录数

Dim book(1 to 5 000)As String

Dim content(1 To 5 000)As String，content1(1 To 5 000)As String  ‘存储类别内容

Dim sales(1 To 5 000)As Long，sales1(1 To 5 000)As Long     ‘存储销售量

Private Sub Form Load( )

  Dim conn As New ADODB．Connection，rs As New ADODB．Recordset

  Dim strSQL As String

  conn. ConnectionString="Provider=Microsoft. ACE. OLEDB. 12. 0; Data Source="＆App. Path&"＼major. accdb"

  conn. Open

  strSQL="SEl．ECT*FROM count"

  Set rs．ActiveConnection=conn

  ‘从数据表中读取图书类别、类别内容、销售量分别存储到数组book、content、sales中

  ‘数据库实际读取的记录数存储在变量num中

  ‘代码略

End Sub

 Private Sub Command1_Click()

  Dim m As String，n As String，c As Integer，s As Long

  Dim i As Integer，j As Integer，k As Integer

  List1．Clear

  c=0：s=0

  m=Text1．Text

  For i=l To num    ‘将符合的类别内容、销售量重新存储到数组content1、sales1中

    If m=book(i)Then

        c=c+1

        content1(c)=content(i)

        sales1(c)=sales(i)

                              ‘①

    EndIf

  Next i

  For i=1 To                ‘②

    List1．AddItem content1(i)&"  "&Str(sales1(i))

  Next i

  Text2．Text=Str(s)

End Sub

   Const n = 6

   Dim a(1 To n) As Integer

   Dim i As Integer, j As Integer, t As Integer

   Do While True

For i=1 to n-1

      If a(i)>a(i+1) then Exit For

Next i

     If i < n Then

       For i = 1 To n

        j = Int(Rnd * 6) + 1

        t = a(j): a(j) = a(i): a(i) = t

       Next i

     Else

       Exit Do

     End If

   Loop

数组中a(1)到a(6)的值依次为“56，34，48，87，65，96”，经上述程序段执行后a(1)到a(6)的值依次为（  ）

Dim c As String, i As Integer

Dim s As String, s1 As String

s = "Jishu_Xuankao_2020"

s1 =""

For i = 1 To Len(s) Step 2

  c = Mid(s, i, l)

  If c >= "a" And c <= "z" Then s1=c+s1

Next i

Text1. Text = s1

执行该程序段后，文本框Text1显示的内容是（  ）