以下程序运行后，单击命令按钮，窗体显示的结果是 ______。
Private Function p1(x As Integer，y As Integel，z As Integer)
p1=2*x+y+3*z
End Function
Private Function p2(x As Integer，y As Integer，z As Integer)
p2=p1(2，y，x)+x
End Function
Private SubCommandl_Click()
Dim a As Integer
Dim b As Integer
Dim c As Integer
a=2:b=3:c=4
Print p2(c，b，

A．
End SubA) 19

B．21

C．22

D．23

国务院《建设工程质量管理条例》及建设部有关文件规定，建设工程质量监督机构有（）种权限。

A、6

B、2

C、3

D、4