16.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TIME，且取消其“可见”属性。为使运行时可以使快捷菜单的菜单项响应鼠标左键单击和右键单击，应设置如下事件过程： A、Private Sub Form_MouseDown(Button As Integer,Shift As Integer, _ X As Single,Y As Single) If Button=2 Then PopupMenu TIME,2 End Sub B、Private Sub Form_MouseDown(Button As Integer,Shift As Integer, _ X As Single,Y As Single) PopupMenu TIME,0 End Sub C、Private Sub Form_MouseDown(Button As Integer,Shift As Integer, _ X As Single,Y As Single) If (Button=vbLeftButton)Or(Button=vbRightButton)Then PopupMenu TIME End Sub D、Private Sub Form_MouseDown(Button As Integer,Shift As Integer, _ X As Single,Y AS Single) PopupMenu TIME End Sub

A       B       C       D

17.窗体中代码如下： Private Sub Form_Click( ) Dim x As Integer,y As Integer,z As Integer x=1:y=2:z=3 Call Procl(x,x,z) Call Procl(x,y,y) End Sub Private Sub Procl(x As Integer,y As Integer,z As Integer) x=3*z y=2*z z=x+y Print x;y;z End Sub 窗体运行后，单击窗体，输出结果为 A、6 6 12 6 10 10 B、9 6 15 6 5 10 C、9 6 15 6 10 10 D、9 10 10 9 10 15

A       B       C       D

18.要想在过程调用后返回两个结果，下面的过程定义语句合法的是____。 A、Sub Procl(ByVal,n,ByVal m) B、Sub Procl(n,ByVal m) C、Sub Procl(n,m) D、Sub Procl(ByVal n,m)

A       B       C       D

19.改变驱动器列表框的Drive属性值将激活____事件。 A、KeyUp B、KeyDown C、Change D、Scroll

A       B       C       D

20.在参数传递过程中，使用关键字_____来修饰参数，可以使之按值传递。 A、ByVal B、ByRef C、Value D、Reference

A       B       C       D