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问题 单项选择题

十二指肠的叙述，正确的是

A．有肠系膜
B．环绕胰尾
C．不属于上消化道
D．是小肠中最固定的部分
E．球部位于胃体和胰体之间

答案

参考答案：D

解析：十二指肠没有肠系膜，环绕胰头，属上消化道。十二指肠球部为十二指肠上部左侧，与幽门相连接部分。

单项选择题

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 u sed 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.

A．things

B．pictures

C．languages

D．diagrams
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多项选择题

新加坡青奥会前三强分别是哪三个国家（）

A、中国

B、美国

C、日本

D、韩国

E、俄罗斯
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