单项选择题

下列程序段的执行结果为 ______。
Dim m(3，3)As Integer
Dim i As Integer
Dim j As Integer
Dim x As Integer
For i=1 To 3
m(i，i)=i
Next
For i=0 To 3
For j=0 To 3
x=x+m(i，j)
Next
Next
Print x

A．3
B．4
C．5
D．6

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单项选择题

编写如下事件过程： Private Sub Form_MouseDown(Button As Integer，Shift As Integer，X As Single， Y As Single) If Shift=6 And Button=2 Then Print BBBB ． End If End Sub 程序运行后，为了在窗体上输出“BBBB”，应执行的操作为 ______。

A．同时按下Shift键和鼠标左键
B．同时按下Shift键和鼠标右键
C．同时按下Ctrl、Alt键和鼠标左键
D．同时按下Ctrl、Alt键和鼠标右键

单项选择题

以上程序段运行的结果是：______. Dim a(-1 To 5) As Boolean Dim flag As Boolean flag = False Dim i As Integer Dim j As Integer Do Until flag = True For i = -1 To 5 j=j+1 if a(i)= False Then a(i)= True Exit For End If If i = 5 Then flag = True End If Next Loop Print j

A．20
B．7
C．35
D．8

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