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问题 选择题

下图是我国北方地区铁路交通略图，图中数码所表示的铁路线名称，正确的一组是：

A．①包兰线 ③京广线⑤兰青线⑦京包线

B．②同蒲线 ③兰新结⑥陇海线⑦京包线

C．③京广线 ④京沪线⑥浙赣线⑦大秦线

D．①包兰线 ③京九线⑤兰新线⑦京包线

答案

答案：D

本题考查我国的铁路分布。根据图示铁路经过的地理事物和城市位置判断，①表示包兰线；②表示京广线；③表示京九线；④表示京沪线；⑤表示兰新线；⑥表示陇海线；⑦表示京包线。

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 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.

（73）处填（）。

A．things

B．pictures

C．languages

D．diagrams
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单项选择题

火焰式探测器是利用( )探测火灾。

A．红外线

B．日光盲

C．光电效应

D．光效应
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