下列药物中,不须做过敏试验的是:
A.普鲁卡因
B.链霉素
C.破伤风抗毒素
D.利多卡因
E.细胞色素C
参考答案:D
He ______________ his way through the crowd to the front of the line. [ ]
A. felt
B. lost
C. pushed
D. fought
参与补体旁路的激活途径的主要成分是()
A.Clr
B.C4
C.C2
D.C3
E.C1q