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．metadata

B．components

C．models

D．entities

10个月小儿患化脓性脑膜炎，脑脊液培养为脑膜炎双球菌，首选的药物是（）

A.青霉素

B.磺胺嘧啶钠

C.氯霉素

D.庆大霉素

E.红霉素