Ruth has been married ___ Steven for ten years but she does not know her husband is a door-keeper.

A．with

B．to

C．for

D．on

规模小、时间短、专业面窄的项目适宜采用的组织形式是( )。

A．项目式

B．平衡矩阵式

C．职能式

D．弱矩阵式