The software architecture of a program or computing system is the structure or structures of the system, which comprise software______, the externally ______ properties of those components, and the relationships between them. The architecture is not the operational software. Rather, it is a ______ that enables a so, ware engineer to: analyze the ______ of the design in meeting its stated requirements, consider architectural alternatives at a stage when making design changes is still relatively easy, and reduce the ______ associated with the construction of the software.

A．pattern
B．models
C．metadata
D．components

具有灭菌作用的是（）

A.70％乙醇

B.0.1％苯扎溴铵（新洁尔灭）

C.0.1%洗必泰

D.2%戊二醛

E.0.5%碘酊