在窗体上有一个List1列表框，并有如图所示的5个项目，还有一个Text1文本框和一个Command1命令按钮，并编写了如下程序代码：
Private Sub Command1_Click() Dim ch As String ch = "" For k = 0 To List1.ListCount - 1 If Left(List1.List(k), Len("数据")) = "数据" Then List1.RemoveItem k End If Next k For k = List1.ListCount - 1 To 0 Step -1 ch = ch & List1.List(k) Next k Text1 = chEnd Sub程序运行时单击命令按钮后，在文本框中显示的是

单项选择题编写如下程序：Private Sub Form_Click() Dim a a = Array(1, 2, 3, 4, 5, 6, 7, 8, 9, 10) n = InputBox( 请输入一个小于10的正整数 ) i = UBound(a) For k = n To (i - n) 2 + n x = a(k) a(k) = a(i) a(i) = x i = i - 1 Next k For k = 0 To UBound(a) Print a(k); Next kEnd Sub程序运行后，单击窗体，并输入4，则输出结果是

单项选择题编写如下程序：Private Sub Command1_Click() Dim k As Integer x = 1 For k = 1 To 3 x = x * fun(k) Next k Print xEnd SubFunction fun(x As Integer) As Integer Static a a = a + 1 fun = a * xEnd Function程序运行后，单击命令按钮Command1，输出结果为