[填空题] 执行下面程序,单击命令按钮Command1,窗体上显示的第一行内容是（）,第二行内容是（）,第三行内容是（）.Option ExplicitPrivate Sub Command1_Click()Dim a As Integer, b As Integer, i As Integera = 1b = 5For i = b To a Step -1a = a + ib = b + aIf b > 30 Then Exit ForPrint a, bNext iPrint a, bEnd Sub
