— What do you think of the suggestion ____ he put forward at the meeting yesterday?

— Personally I don't agree to the suggestion ____ we should spend less money on the project. [ ]

A. which; that

B. that; which

C. which; which

D. what; that

白细胞向着化学刺激物作定向移动的现象称为（）

A.白细胞渗出

B.白细胞游出

C.趋化作用

D.调理素化

E.白细胞吞噬