程序运行后，单击窗体，屏幕显示的结果是()。Private Sub Form_Click()num1="乙"num2=76SelectCase numl Case"甲"If num2＞=80 ThenPrint"德艺优秀" Else If num2＞=60 ThenPrint"德优秀，艺普通" End If Case"乙"If num2>=80 ThenPrint"德艺双佳" Elselfnum2>=60 ThenPrint"德艺普通" End If End Select End Sub