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问题 单项选择题

炎热季节混凝土施工，下列哪个关于养护的说法是正确的（）。

A.经常洒水且水量越大越好

B.通风要良好

C.可采用蒸汽加热养护

D.经常洒水使混凝土保持湿润

答案

参考答案：D

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.

（75）处填（）。

A．Activity diagrams

B．Use-case diagrams

C．Structural diagrams

D．Behavioral diagrams
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单项选择题

女，23岁，因停经42天，少量 * * 流血2天，尿妊娠试验阳性，行人工流产术，吸刮出少量组织，未见绒毛，病理报告为"蜕膜组织"。首先应考虑为（）

A.先兆流产

B.月经不调

C.异位妊娠

D.慢性子宫内膜炎

E.滋养细胞疾病
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