It should go without saying that the focus of UML is modeling. However, what that means, exactly, can be an open-ended question. （）is a means to capture ideas, relationships, decisions, and requirements in a well-defined notation that can be applied to many different domains. Modeling not only means different things to different people, but also it can use different pieces of UML depending on what you are trying to convey. In general, a UML model is made up of one or more（）. A diagram graphically represents things, and the relationships between these things. These（）can be representations of real-world objects, pure software constructs, or a description of the behavior of some other objects. It is common for an individual thing to show up on multiple diagrams; each diagram represents a particular interest, or view, of the thing being modeled. UML 2.0 divides diagrams into two categories: structural diagrams and behavioral diagrams.（）are used to capture the physical organization of the things in your system, i.e., how one object relates to another.（）focus on the behavior of elements in a system. For example, you can use behavioral diagrams to capture requirements, operations, and internal state changes for elements.

（）are used to capture the physical organization of the things in your system, i.e., how one object relates to another.

A．Activity diagrams

B．Use-case diagrams

C．Structural diagrams

D．Behavioral diagrams

2008年3月，潍坊市出台“关于加强文化建设的意见”，各部门积极行动，开展了一系列活动：举办“文化建设理论”讲座，明确文化建设的指导思想；挖掘整理木版年画、剪纸等传统工艺，并结合时代进行创新；吸收国外风筝审美独特，外观简洁、放飞性能好等优点，改进本地传统风筝制作工艺；依法打击不健康文化活动，清理文化垃圾，开展“传统文化、外来文化利弊谈”征文活动；开展“道德模范人物”评选活动……

结合上述做法，分析该市推进先进文化建设的理论依据。

________________________________________________________________________________________________________________________________________________________________________________________