填空题： 设有如下程序： Prirate Sub Form_Click() Dim a As Integer,b AS Integer a=20:b=50 p1

设有如下程序：

Prirate Sub Form_Click()

Dim a As Integer,b AS Integer

a=20:b=50

p1 a,b

p2 a,b

p3 a,b

Print"a="；a,"b=";b

End Sub

Sub p1(x As Integeh By Val y As Integer)

x=x+10

y=y+20

End Sub

Sub p2(ByVal x As Integer,y As Integer)

x=x+10

　y=y+20

End Sub

Sub p3 (ByVal x As Integer,ByVal y As Integer)

　x=x+10

　y=y+20

End Sub

该程序运行后，单击窗体，则在窗体上显示的内容是：a= (11) 和b= (12) 。