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问题 单项选择题

图14-11所示体系的几何组成为（）。

 

A.常变体系B. 瞬变体系

C.无多余约束几何不变体系

D. 有多余约束几何不变体系

答案

参考答案：B

解析：

去掉两个二元体，利用二刚片规则分析，三个链杆相交于一点，不满足二刚片规则，为瞬变体系，因此正确答案选择B。

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. (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
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单项选择题

创业前一定要定位准确。定位分两个层面，一是对自我的定位与认知要准确；二是所做项目要市场定位清晰，做好市场细分与定位。对于这种说法，你认为：（）

A.正确

B.错误
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