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问题 名词解释

自感

答案

参考答案：

穿过回路的磁链是由回路本身的电流产生的，则磁链与电流的比值为自感。

填空题

已知在△ABC中，sinA：sinB：sinC=3：2：4，则角C的值为______．
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单项选择题

假定已经在菜单编辑器中建立了窗体的弹出式菜单，其顶级菜单的名称为a1，其“可见”属性为False，则程序运行后，可以同时响应鼠标左键单击和右键单击的事件过程是 ______ 。

A．Private Sub Form_ MouseDown (Button As Integer, _ Shift As Integer, X As Single, Y As Singl If Button = 1 And Button = 2 ThenPopupMenu al End If End Sub

B．Private Sub Form_ MouseDown (Button As Integer, _ Shift As Integer, X As Single, Y As SinglPopupMenu a1 End Sub

C．Private Sub Form_ MouseDown (Button As Integer, _ Shift As Integer, X As Single, Y As SinglIf Button = 1 Then PopupMenu a 1End If End Sub

D．Private Sub Form_ MouseDown(Button As Integer, _ Shift As Integer, X As Single, Y As SinglIf Button = 2 Then PopupMenu a 1End If End Sub
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