单击一次命令按钮之后，在对话框中输入10，20，30，40，窗体中的输出结果为______ 。 Private Sub Command1_ Click()Dim a(4) As IntegerFor i = 1 To 4 a(i) = InputBox (“请输入:”)Next iCall subper (a)For i = 1 To 4 Print a(i)Next i End Sub Sub subper (b () As Integer)For i = 1 To 4 b(i) = 2 * iNext i End Sub

A．10 20 30 40

B．1 2 3 4

C．2 4 6 8

D．5 10 15 20