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单项选择题

在软件测试设计中,软件测试的主要目的是

A.实验性运行软件
B.证明软件正确
C.找出软件中全部错误
D.发现软件错误而执行程序
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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,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

单项选择题任何控件都有的属性是

A.BackColor
B.Caption
C.Name
D.BorderStyle