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问题 单项选择题

下列哪一组药物均能祛风湿，补肝肾，强筋骨

A．桑寄生，五加皮，狗脊
B．桑寄生，木瓜，五加皮
C．桑枝，狗脊，五加皮
D．虎骨，独活，五加皮
E．虎骨，狗脊，白花蛇

答案

参考答案：A

选择题

某地牛肉的价格(P)与其需求量(Q)存在如图所示关系。在其他条件不变的情况下，下列判断正确的是

①牛肉的价格由PA向PB运动时，其需求量会增加

②牛肉的需求量由QB向QA运动时，其价格会上涨

③牛肉的价格由PB向PA运动时，羊肉的需求量会增加

④牛肉的需求量由QA向QB运动时，羊肉的价格会上涨

A．①②

B．②③

C．①③

D．②④
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单项选择题

For nearly ten years,the Unified Modeling Language (UML) has been the industry standard for visualizing,specifying,constructing,and documenting the(1)of a software-intensive system.As the(2)standard modeling language,the UML facilitates communication and reduces confusion among project(3).The recent standardization of UML 2.0 has further extended the language's scope and viability.Its inherent expressiveness allows users to(4)everything from enterprise information systems and distributed Web-based applications to real-time embedded systems. 　　

The UML is not limited to modeling software.In fact,it is expressive enough to model (5)systems,such as workflow in the legal system,the structure and behavior of a patient healthcare system,software engineering in aircraft combat systems,and the design of hardware. 　　

To understand the UML,you need to form a conceptual model of the language,and this requires learning three major elements:the UML's basic building blocks,the rules that dictate how those building blocks may be put together,and some common mechanisms that apply throughout the UML.

空白（3）处应选择（）

A.investors

B.developers

C.designers

D.stakeholders
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