问答题

设有如下程序:
Private Sub Form_Click()
Dim i As Integer,x As String,Y As String
x=”ABCDEFG”
For i=4 To 1 Step-1
y=Mid(x,i,i)+y
Next i
Print y
End Sub
程序运行后,单击窗体,输出结果为

A.ABCCDEDEFG
B.AABBCDEFG
C.ABCDEFG
D.AABBCCDDEEFFGG
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