目前临床上常用的检测乙型肝炎最常用方法是

A．免疫电镜检测粪便标本中病毒颗粒

B．RIA和ELISA检测患者血清中HBV抗原抗体

C．直接分离培养

D．PCR检测血液中HBV抗原抗体

E．ELISA检测患者血清中HBV抗原

已知有下面过程Private Sub proc1(a As Integer,b As String,Optional x As Boolean)End Sub正确调用此过程的语句是【 】

A．Call proc1(5)

B．Call proc1 5," abe ",False

C．proc1(12,"abe",True)

D．proc15,"abe"