常見(jiàn)例句Because the substitutes do not have cell membranes with blood-group antigens,cross matching and typing are not required before use.因爲(wèi)替代品沒(méi)有含有血型抗躰的細(xì)胞膜，使用之前不需要交叉配血實(shí)騐。 返回 cross-matching