单项选择题
SOX is an alternative（1）for XML. It is useful for reading and creating XML content in a（2）editor. It is then easily transformed into proper XML. SOX was created because developers can spend a great deal of time with raw XML. For many of us, the popular XML（3）have not reached a point where their tree views, tables and forms can completely substitute for the underlying（4）language. This is not surprising when one considers that developers still use a text view, albeit enhanced, for editing other languages such as Java. SOX uses（5）to represent the structure ofan XML document, which eliminates the need for closing tags and a number of quoting devices. The result is surprisingly clear.
单项选择题
某软件公司欲设计一款图像处理软件，帮助用户对拍摄的照片进行后期处理。在软件需求分析阶段，公司的系统分析师识别出了如下3个关键需求：图像处理软件需要记录用户在处理照片时所有动作，并能够支持用户动作的撤销与重做等行为。图像处理软件需要根据当前正在处理的照片的不同特征选择合适的处理操作，处理操作与照片特征之间具有较为复杂的逻辑关系。图像处理软件需要封装各种图像处理算法，用户能够根据需要灵活选择合适的处理算法；软件还要支持高级用户根据一定的规则添加自定义处理算法。在系统设计阶段，公司的架构师决定采用设计模式满足上述关键需求中对系统灵活性与扩展性的要求。具体来说，为了支持灵活的撤销与重做等行为，采用（1）最为合适：为了封装图像操作与照片特征之间的复杂逻辑关系，采用（2）最为合适；为了实现图像处理算法的灵活选择与替换，采用（3）最为合适。
单项选择题
VRML is a（1）for 3D multimedia and shared virtual worlds on the WWW. In comparison to HTML, VRML adds the next level of interaction, structured graphics, and extra（2）（z and time） to the presentation of documents. The applications of VRML are（3）,ranging from simple business graphics to entertaining WWW page graphics, manufacturing, scientific, entertainment, and educational applications, and 3D shared virtual worlds and communities. X3D is the name under which the development of VRML is continued. X3D is based on XML and is backwards（4）with VRML. Furthermore, it is componentized, profiled, and extensible, which makes it possible to use X3D in very different（5），from high-end visualizations to lightweight applications.
