It should go without saying that the focus of UML is modeling. However, what that means, exactly, can be an open-ended question. (71) 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 (72) . A. diagram graphically represents things, and the relationships between these things. These (73) 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. (74) are used to capture the physical organization of the things in your system, i.e., how one object relates to another. (75) 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.

（71）处填（）。

A. Programming

B. Analyzing

C. Designing

D. Modeling

国家发改委要求各地有关部门制定政策或采取措施鼓励和引导民营企业发展战略性新兴产业。之所以鼓励和引导民营企业发展战略性新兴产业，是因为（     ）

A．民营企业是以营利为目的的经济组织

B．民营企业是社会主义经济的重要组成部分

C．它有利于促进我国产业结构的调整和生产力的发展

D．它有利于增强国有经济活力、控制力、影响力