搜题请搜索小程序“爱下问搜题”
问题 单项选择题

当实际施工进度发生拖延时，为加快施工进度而采取的组织措施可以是( )。

A．改善劳动条件及外部配合条件

B．更换设备，采用更先进的施工机械

C．增加劳动力和施工机械的数量

D．改进施工工艺和施工技术

答案

参考答案：C

选择题

下列反应的离子方程式正确的是 [ ]

A．铝片投入烧碱溶液 Al + 2OH- == AlO2- + H2↑

B．过氧化钠投入水中 2O22- + 2H2O == 4OH- + O2↑

C．碳酸钡溶于盐酸 CO32- + 2H+ == H2O + CO2↑

D．金属钠跟水反应 2Na + 2H2O == 2Na+ + 2OH- + H2↑

查看答案
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
查看答案