洋地黄的主要适应证不包括哪项：（）

A.急、慢性充血性心力衰竭

B.阵发性室上性心动过速

C.房室传导阻滞

D.心房扑动

E.快速性心房颤动

执行下列程序后，鼠标单击窗体，输出结果为
Private Sub Form_Click()
Print "Click"；
End Sub
Private Sub Form_MouseDown(Button As Integer，Shift As Integer，X As Single，Y As Single)
Print "Donw"
End Sub
Private Sub Form_MouseUp(Button As Integer，Shift As Integer，X As Single，Y As single)
Print "Up"
End Sub

A．DownUpClick

B．ClickDownUp

C．DownClickUp

D．UpDownclick