单项选择题
A.IgG与抗原结合成的免疫复合物 B.IgM C.IgG2 D.聚合的IgA E.SIgA
A.C3 B.C8 C.C1q D.C5 E.C4
A.C123456789 B.C124536789 C.C145236789 D.C142356789 E.C124356789