单项选择题

C++语言中关于构造函数的说法正确的是( )。

A. %
B. #
C. !
D. $
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单项选择题
对下列二叉树: 进行中序遍历的结果是()

A.ACBDFEG
B.ACBDFGE
C.ABDCGEF
D.FCADBEG

单项选择题
已知有定义constintD=5;inti=1;doublef=0.32;charc=15;则下列选项错误的是( )。
A. Private Sub Form_MouseDown(Button As Integer, Shift As Integer,_               X As Single, Y As Single)   If Button=2 Then PopupMenu Bt, 2  End Sub
B.Private Sub Form_MouseDown(Button As Integer, Shift As Integer, _               X As Single, Y As Single)   PopupMenu Bt  End Suh
C. Private Sub Form MouseDown(Button As Integer, Shift As Integer, _               X As Single, Y As Single)   PopupMenu Bt,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 Bt  End Sub
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