二尖瓣脱垂A．Graham-Steel杂音 B．Austin-Flint杂音 C．胸

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）处应填（）。

A．Programming

B．Analyzing

C．Designing

D．Modeling

根据《物权法》的规定，下列表述中，不正确的是( )。

A．所有权和抵押权可以同时存在于一物之上

B．用益物权和抵押权可以同时存在于一物之上

C．一间房屋上可以同时存在两个所有权

D．一间房屋上可以同时存在两个抵押权

患者，男，65岁，晚期胰腺癌，治疗效果不佳，疼痛剧烈，患者感到痛苦、悲哀，有轻生念头。

患者心理反应属于（）。

A.否认期

B.愤怒期

C.协议期

D.忧郁期

E.接受期

实务衡量的优点是( )。

A．简单精确

B．全面科学

C．简单全面

D．直观易行

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