下面抑制补体活化的经典途径C3转化酶形成的补体调节因子有()
A.B因子
B.I因子
C.C4bp
D.MCP
E.DAF
参考答案：B, C, D, E
His performance in the play didn't reach the required standard by the director, __, he failed.
A．in words
B．in another word
C．in a word
D．in other words
组织合理运输的方针有______
A．迅速
B．安全
C．准确
D．节省
E．方便
