肾小球内系膜细胞具有下列功能()
A.收缩功能
B.吞噬功能
C.产生血管活性物质
D.血管活性因子及生长因子
E.合成系膜基质和胶原
参考答案:A, B, C, D, E
秘书的人际关系最主要的是秘书与()。
A.上级领导的关系
B.本级领导的关系
C.本级职能部门的关系
D.本单位群众的关系
The professor can hardly find sufficient grounds () his argument in favour of the new theory.
A. which to base on
B. on which to base
C. to base on which
D. which to be based on