停（备）用热力设备防锈蚀方法主要选择原则是什么？

直线mx+2y+3m﹣2=0过定点的坐标是（    ）．

下列句子语序调整后，意思变化最大的一组是 （  ）

A．人不犯我，我不犯人。——我不犯人，人不犯我。

B．当局者迷，旁观者清。——旁观者清，当局者迷。

C．善有善报，恶有恶报。——恶有恶报，善有善报。

D．人为刀俎，我为鱼肉。——我为鱼肉，人为刀俎。

下列有关文学常识的表述不正确的一项是[ ]

A ．古代著名文学家韩愈被列为“唐宋八大家之首”，他写的《师说》论述了从师学习的重要性。

B ．朱自清是我国现代文学家，其散文代表作有《荷塘月色》《想北平》等。

C. 李白是唐代著名的浪漫主义诗人，我们学过他的《蜀道难》《将进酒》等著名诗篇。

D ．《桥边的老人》是美国著名作家海明威的作品，他因中篇小说《老人与海》获诺贝尔文学奖。

保税货物与减免税货物的区别有( )

A．性质不同

B．货物范围不同

C．海关手续不同

D．海关监管方式不同

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（5）处应选择（）

A.non-hardware

B.non-software

C.hardware

D.software