窗体上有两个文本框Text1、Text2以及一个命令按钮Comanand1，编写下列程序：
Dim y As Integer
Private Sub Command1_Click()
Dim x As Integer
x=2
Text1.Text = p2(p1(x), y)
Text2.Text = p1(x)
End Sub
Private Function p1(x As Integer) As Integer
x=x+y:y=x+y
p1=x+y
End Function
Private Function p2(x As Integer, y As Integer) As Integer
p2=2*x+y
End Function
当单击1次和单击2次命令按钮后，文本框Text1和Text2内的值分别为( )。

A．2 4
2 4

B．2 4
4 8

C．4 4
8 8

D．10 10
58 58

闸阀在使用时可做调节阀用。