用胃蛋白酶水解IgG，得到的片段是() ["A．1个Fab段和1个Fc段","B．2个Fab段和1个Fc段","C．1个F(ab')2段和1个pFc'","D．1个F(ab')2和1个Fc段","E．2个Fab段和1个pFc'段"]
补体活化过程中形成的攻膜复合体(MAC)是() ["A．C5b67","B．C5b678","C．C5b6789","D．C6789","E．C789"]
能通过自行衰变从而阻断补体级联反应的补体片段是() ["A．C2a","B．C3a","C．C3c","D．C4b","E．C5a"]
下列与C3转化酶形成无关的补体成分是() ["A．C3","B．C2","C．C4","D．C5","E．B因子"]
对义齿只具有固位作用，而无支持作用的卡环是()对义齿既具有固位作用，又具有支持作用的卡环是() ["A．双臂卡环","B．间隙卡环","C．两者都是","D．两者都不是"]
属于冠内固位体的是()属于冠外固位体的是()
