6. 下列何種理論最能 說明抗體多樣性( antibody diversity )?
A. germ -line theory
B. germ -line configuration theory
C. somatic hypermutation theory
D. clonal selection theory
7. 下列何種調節因子能結合 C3 轉化 酶(convertase ),促使其去活化( inactivation )?
A. decay -accelerating factor
B. C-reactive protein
C. properdin
D. Factor B