An architectural style defines as a family of such systems in terms of a（71） of structural organization. More specifically, an architectural style defines a vocabulary of（72） and connector types, and a set of（73）on how they can be combined. For many styles there may also exist one or more（74）that specify how to determine a system’s overall properties from the properties of its parts. Many of architectural styles have been developed over the years.The best-known examples of（75）architectures are programs written in the Unix shell.

A．semantic models

B．weak entities

C．data schemas

D．business models

柜坊被视为我国最早的银行雏形，是因为它：（）

A.兼营旅店、货栈和交易

B.专营货币的存放和借贷

C.印制纸币交子，代替铁钱在市场流通

D.发放飞钱，类似后世的汇票