参与补体系统替代激活途径的始动分子是 ()
A.C1
B.C1q
C.C3
D.C3b
E.C3bBb
参考答案:D
Schools in the east tend to be better equipped, ____ those in the west are relatively poor.
A.As
B.While
C.When
D.But
仓库信息系统中不包括()
A.WMS
B.TMS
C.RFID
D.CAPS