单项选择题

A.0.3mg雷珠单抗,0.5mg雷珠单抗,安慰剂
B.0.3mg雷珠单抗,0.5mg雷珠单抗,维速达尔PDT
C.0.5mg雷珠单抗,2.0mg雷珠单抗,维速达尔PDT