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问题 单项选择题

下列选项中不属于政府债券特征的是（）。

A.安全性高

B.免税待遇

C.收益率高

D.流通性强

答案

参考答案：C

解析：政府债券的收益率稳定，但是不意味着收益率高。一般来说，风险越小的有价证券，其收益率越低，所以C选项不是政府债券的特征。

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 (71) of a software-intensive system. As the (72) standard modeling language, the UML facilitates communication and reduces confusion among project (73) . The recent standardization of UML 2.0 has further extended the language's scope and viability. Its inherent expressiveness allows users to (74) 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 (75) 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.

（73）处填（）。

A．investors

B．developers

C．designers

D．stakeholders
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单项选择题

第三次信息技术革命指的是（）。

A.互联网

B.物联网

C.智慧地球

D.感知中国
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