单项选择题

下面的数组声明语句中正确的是

A．Dim gg[1,5]As String
B．Label1.BackStyle=1
C．Dim gg(1 To 5)As String
D．Dim gg[1:5,1:5]As String
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单项选择题
下列程序段的结果为 A= ABBACDDCBA Fori=6 To 2 Step-2 X=Mid(A,i,i) Y=Left(A,i) Z=Right(A,i) Z=X&Y&Z Next Print Z
A．ABC
B．AABAAB
C．BBABBA
D．ABBABA
单项选择题
设已经在菜单编辑器中设计了窗体的快捷菜单，某顶级菜单为a1，且取消其“可见”属性。运行时，哪个事件过程可以使快捷菜单的菜单项响应鼠标左键单击和右健单击的事件过程是
A．Private Sub Form_MouseDown(Button As Integer，Shift As Integer,_X As Single，Y As Single)
　　If Button=2 Then PopupMenu al,2
　End Sub
B．Private Sub Form_MouseDown(Button As Integer，Shift As Integer,_X As Single，Y As Single
　　PopupMenu al,0
　End Sub
C．Private Sub Form_MouseDown(Button As Integer，Shift As Integer,_X As Single，Y As Single
　　PopupMenu al
　End Sub
D．Private Sub Form MouseDown(Button As Integer，Shift As Integer,_X As Single，Y As Single
　　If(Button=vbLetfButton)Or(Button=vbRightButton)Then PopupMenu al
　End Sub
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