趋化因子是（）
A.C4b2a
B.C3bBbP
C.C5a
D.C4b
E.C5b6789n
参考答案：C
某单层工业厂房设计跨度为42m，主体结构一般应采用( )。
A．砌体结构B．钢筋混凝土结构C．混凝土结构D．钢结构
--I think the green coat _________ her very well.
--That's right. Why not buy one for your daughter?
A．is fit
B．matches
C．suitable
D．fit for
