It should go without saying that the focus of UML is modeling. However, what that means,exactly, can be an open-ended question. (1) 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 (2) .A diagram graphically represents things, and the relationships between these things. These (3)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.(4) are used to capture the physical organization of the things in your system, i.e., how one object relates to another.(5) 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.

空白（1）处应选择（）

A.Programming

B.Analyzing

C.Designing

D.Modeling

下列关于胸内心脏按压的说法，正确的是（）

A.胸廓严重畸形或伴心脏移位者不适用于胸内心脏按压

B.进行胸内心脏按压时，挤压频率为80～100次／分，挤压用力应均匀，切忌指尖用力，以免损伤心肌

C.注意观察心肌的颜色、张力，必要时可经无血管区直接心内注药，或行电除颤

D.待心律、血压稳定，用新洁尔灭反复冲洗胸腔，胸腔内置抗生素，关闭胸腔，并予闭式胸腔引流

E.自胸骨旁左侧2.5cm至左腋前线，沿第三或者第四肋间隙作弧形切口