上述显像剂中最适合于前哨淋巴结定位的是

A.^99mTc-ASC

B.^99mTc-PYP

C.^99mTc-HAS

D.^99mTc-MDP

E.^99mTc-DX

在窗体上添加一个命令按钮（名为Command1），然后编写如下程序：Function m(x As Integer, y As Integer) As Integer m = IIf(x > y, x, y)End FunctionPrivate Sub Command1_Click() Dim a As Integer, b As Integer a = 1 b = 2MsgBox m(a, b) End Sub打开窗体运行后，单击命令按钮，消息框中输出结果为_________。