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.

In general, a UML model is made up of one or more（）.

A．views 　

B．diagrams 　

C．user views 　

D．structure pictures

北京市A企业，与上海市的B企业有业务往来。一天，A通过邮局将一份重要邮件寄给B，现该邮件没能及时送达B，因此事给A造成了价值30万元的经济损失。

下列关于邮件赔偿的表述不正确的是______。

A．对于给据邮件的损失，邮政企业不负赔偿责任

B．对于平常邮件的损失，邮政企业不负赔偿责任

C．用户自交寄给据邮件或者交汇汇款之日起满一年内未查询又未提出赔偿要求的，邮政企业不负赔偿责任

D．除汇款和保价邮件以外的其他给据邮件由于不可抗力的原因造成的损失，邮政企业不负赔偿责任