185. Hello! I_______ you _______ in London. How long have you been here?

A．don't know…were

B．hadn't known…are

C．haven't known …are

D．didn't know … were

下列措施中，不属于接种预防的是（  ）

A．婴幼儿注射百白破三针

B．为幼儿口服脊灰质疫苗

C．为肝炎患者注射胎盘球蛋白

D．为青少年注射乙肝疫苗