未分类题在窗体上面—个名称为Command1的命令按钮,并编写以下程序: Private Sub Command1_Click() Print fun('ABCDEFG') End Sub Function fun(st As String)As String stlen=Len(st) tempe='' For k=1 To stlen 2 temp=temp+Mid(st,k,1)+Mid(st,stlen-k+1,1) Next k fun=temp End Function 程序运行时,单击命令按钮,则在窗体上显示的是______。D.AGBFCED
A.ABCDEFG
B.AGBFCE
C.GFEDCBA