若某二叉树的前序遍历访问顺序是abdgcefh，中序遍历访问顺序是dgbaechf，则其后序遍
历的结点访问顺序是

A．8K
B．16K
C．32K
D．64K

A．Private Sub Form_Mouse Down(Button As Integer，Shift As Integer，-

　　　　　X As Single，Y As Single)

　　If Button=2 Then PopupMenu Bs，2

　　End Sub

B．Private Sub Form_MouseDown(Button As Integer，Shift As Integer，-

　　　　　　　　X As Single，Y As Single)

　　　　PopupMenu Bs

　　End Sub

C．Private Sub FOrm_MouseDown(Button As Integer，Shift As Integer，-

　　　　　　　X As Single，Y As Single)

　　　　PopupMenu Bs，0

　　End Sub

D．Private Sub Form_MouseDown(Button As Integer，Shin As Integer，-

　　　　　　　X As Single，Y As Single)

　　　　If(Button=vbLeftButton)Or(Button=vbRightButton)Then PopupMenu Bs

　　End Sub