下列程序的功能是：将数据1,2,......,8写入顺序文件Num.txt中，请选择正确的程序段Private Sub For

下列程序的功能是：将数据1,2,......,8写入顺序文件Num.txt中，请选择正确的程序段 Private Sub Form_Click() Dim i As Integer Open "Num.txt"For Output As #1 For i=1 To 8 ______ Next i Close #1 End SubA.print#1,i B.input#1,i C.print#1 D.input#1