治疗急性心肌梗死当日出现的室性早搏，应首选( )

A．利多卡因
B．地高辛
C．异搏定
D．苯妥英钠
E．阿托品

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