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问题 单项选择题

操作系统的功能是( )。

A．将源程序编译成目标程序

B．负责诊断机器的故障

C．控制和管理计算机系统的各种硬件和软件资源的使用

D．负责外设与主机之间的信息交换

答案

参考答案：C

解析：操作系统是管理控制和监督计算机各种资源协调运行的。

单项选择题

方舟的游戏于6月6日正式开通。在第二次世界大战中，下列历史事件也发生在6月6日的是（）

A.盟军在诺曼底登陆，开辟了欧洲第二战场

B.日本偷袭珍珠港

C.斯大林格勒保卫战开始

D.德国宣布无条件投降
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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 （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.

（75）处填（）。

A．non-hardware

B．non-software

C．hardware

D．software
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