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 1(1) 2,第二行内容是 3(2) 4,第三行内容是 5(3) 6. Option Explicit Private Sub Command1_Click7 Dim a As Integer, b As Integer, i As Integer a = 1 b = 5 For i = b To a Step -1 a = a + i b = b + a If b > 30 Then Exit For Print a, b Next i Print a, b End Sub