下列VB程序运行时，单击命令按钮Command1后，文本框Text1中显示的内容是 _______,文本框Text2中显示的内容是_________。 Private Sub Command1_Click( ) Dim a(1 To 5) As Long，I As Integer a(1)=1 For i=2 To 5 a(i)=a(i-1)*i Next i Text1.Text=Str(a(2)) Text2.Text=Str(a(5)) End Sub