如图是一列沿x正向传播的简谐横波在传播方向上相距3m的两质点P和Q的振动图象，其实线是P点的振动图象，虚线是Q点的振动图象，若P质点离波源比Q质点近，则该波的最大波长为______

m，若Q质点离波源比P点近，则该波的最大波长是________m。

The software architecture is a set of software components, subsystems, relationships, interactions, the properties of each of these elements, and the set of guiding principles that together constitute the fundamental properties and constraints of a software system or set of systems. （1）defines a general set of element types and their interactions. The examples include Pipes and Filters, Model-View-Controller, and Reflection. A （2）in software architecture is a representation used to understand or document one or more aspects of a problem or solution. Architecture is usually used in conjunction with many adjunct terms. The（3） defines the key strategies, organization, goals and related processes of the enterprise. At the enterprise level, the （4）may be more of a set of guidelines on how the various software architectures should be constructed consistently across the enterprise. The （5）, which describes the high-level set of elements involved in application from a particular domain along with their interactions, is often used to focus on subsystem definition rather than application process level definition.

（3）是（）

A. enterprise architecture

B. technical architecture

C. infrastructure architecture

D. business architecture