补体活化的经典途径的补体激活顺序是() ["A.C143256789","B.C124536789","C.C142356789","D.C124356789","E.C123456789"]
铸造支架完成后,可能由于支架适合性差造成就位困难。请问:有哪些原因可能造成支架适合性差?
有时虽然按正常粉液比调配塑料,但往往在热处理后,发现存在单体不足的现象,请问可能造成此种现象的原因有哪些?
下列有关IgE测定方法,错误的是() ["A.RIA","B.化学发光免疫分析法","C.ELISA","D.PCR","E.乳胶颗粒免疫浊度法"]
IgG分子与C1q的结合位点是() ["A.vH","B.CH1","C.CH2","D.CH3","E.CH4"]
铸件出现毛刺的原因是什么?