设窗体上有一个文体框Text1和一个命令按钮Command1,并有以下事件过程: Private Sub Command1_Click() Dim S As String,ch As String S= For k=1 To Len(Text1) ch=Mid(Text1,k,1) S=ch+S Next k Text1.Text=S End Sub 程序执行时,在文本框中输入“Basic”,然后单击命令按钮,则Text1中显示的是( )
A.Basic
B.cisaB
C.BASIC
D.CISAB