Due to a constantly (66) environment, a poor understanding of the user’s needs and preferences, as well as a (67) of willingness to modify. (68) 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 (69) meta model, the Extended World Wide Web Design Technique (eW3DT), provide hypertext designers (70) a conceptual, user-centric framework and graphical notation for the construction of both, (71) and customized models, during the software development (72) of commercial WIS. A reference model as a normative concept represents an abstraction of a (73) company, its functional units, or its Web Information System and is intended to streamline the design and implementation of complex applications at (74) costs. As precondition for pursuing a partial globalization strategy,eW3DT (75) between technical and content-specific responsibilities for designing, implementing, and maintaining WIS.

（67）（）

A.lack

B.since

C.big

D.lot

下列对铸造支架邻面板作用描述不正确的是（）。

A．引导义齿就位，增强义齿固位力

B．减少义齿受力时对基牙的损害

C．防止食物嵌塞

D．将咬合压力正确传导于基牙

E．降低余留牙龋病的发生率