某二叉树的中序序列和后序序列正好相反,则该二叉树一定是______ 的二叉树。
A.空或只有一个结点
B.高度等于其结点数
C.任一结点无左孩子
D.任一结点无右孩子
参考答案:C
消费者和经营者发生消费权益争议的解决途径中,不包括()。
A.请求消费者协会组织调解
B.与经营者协商和解
C.向有关行政部门申请行政裁决
D.向人民法院提起诉讼
设已经在“菜单编辑器”中设计了窗体的快捷菜单,其顶级菜单为Bs,取消其“可见”属性,运行时,在以下事件过程中,可以使快捷菜单响应鼠标右键菜单的是
A.Private Sub Form_MouseDown(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,Shift As Integer,_ X As Single,Y As Single)If(Button=vbLeftButton)Or(Button=vbRightButton)Then PopupMenu Bs End Sub