天安门广场每天升旗时刻与日出同时，下列节日中，升旗时刻最早的是(     )

程序代码如下：

Private Sub Command1_Click()

  Dim n As Integer, i As Integer

  List1.Clear

  n = Val(Text1.Text)

  If n Mod 2 = 0 Then

    For i = 2 To Int(n / 2)

      If isodd(i) = (isodd(n - i)) Then

        List1.AddItem Str(n) + " =" + Str(i) + " +" + Str(n - i)

      End If

    Next i

  Else

    Text1.Text = Str(n) + "不是偶数！"

  End If

End Sub

Private Function isodd(n As Integer) as boolean

   Dim f As integer

   f = 0

   For i = 2 To Sqr(n)

     If n Mod i = 0 Then f = 1: Exit For

   Next i

   isodd =  f

End Function

It's warm in Harbin today．

关于激素对植物生长发育的调节，下列叙述不正确的是(    )