关系运算中花费时间可能最长的运算是( )。
A. Private Sub Form _ Mouse Up(Button As Integer,Shift AS Integer,_ X As Single,Y As Single) If Button=2 Then PopupMenu mnuEdit,vbPopupMenuCenterAlign Or_ vbPopupMenuRightButton,X,Y,mnuEditOpen End If End Sub
B. Private Sub Form _ MouseUp(Button AS Integer,Shift AS Integer,_ X As Single,Y As Single) If Button=2 Then PopupMenu mnuEdit, End If End Sub
C. Private Sub Form _ MouseUp(Button AS Integer,Shift AS Integer,_ X As Single,Y As Single) PopupMenu mnuEdit,vbPopupMenuCenterAlign Or_ vbPopupMenuRightButton End Sub
D. Private SUb Form _ MouseUp(Button AS Integer,_ Shift As Integer,X As Single,Y As Single) If Button=2 Then PopupMenu mnuEdit,2 End If End Sub