Due to a constAntly ______ environment， a poor understanding of the user’s needs and preferences，as well as a ______ of willingness to modify ______ organizational structures and decision models，the full economic potential of Web Information Systems(WIS) has not been realized by now. The data object types of the ______ meta model，the Extended World Wide Web Design Technique(eW3DT)，provide hypertext designers ______ a conceptual，user-centric framework and graphical notation for the construction of both，______ and customized models， during the software development ______ of commercial WIS. A reference model as a normative concept represents an abstraction of a ______ company，its functional units， or its(Web) Information System and is intended to streamline the design and implementation of complex applications at ______costs. As precondition for pursuing a partial globalization strategy，eW3DT ______ between technical and content-specific responsibilities for designing， implementing， and maintaining WIS.
A．gives
B．distinguishes
C．has
D．difference
参考答案：B
解析：
[分析]： 由于环境的不断发生变化，且对用户的需求理解不清，对现有的组织结构和决策模型的修改缺乏依据，WIS的巨大经济潜力还不被世人所认识到。在商业 WIS软件开发过程中，eW3DT所提出的元模型的数据对象类型，为超文本设计师提供了一个概念的、以用户为中心的框架结构，以及为构造参考模型和个性化模型的图形标记。其中参考模型是一个代表典型企业的抽象的标准概念，它的功能和目的是使WIS系统的设计和开发成本呈线性下降。作为追求部分全球化策略的一个先决条件，eW3DT在为设计、实现和维护WIS中的技术和内容提供方面的作用是显著的。