_____ the police thought he was the most likely one, since they had no exact proof about it,they had to set him free.

A．As long as

B．If only

C．Although

D．As though

按照会计电算化的服务层次和提供信息的深度，可以分为( )不同的发展阶段。

A．会计核算电算化

B．会计管理电算化

C．会计决策电算化

D．会计监督电算化