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问题 单项选择题

手提一根不计质量，下端挂有重物的弹簧，竖直向上作加速运动，当手突然停止运动瞬间，物体将( )。

A．立即停止运动

B．向上作加速运动，处于超重状态

C．向上作减速运动，处于失重状态

D．向上作匀速运动

答案

参考答案：B

单项选择题

现在世界上绝大多数国家都不征收（）。

A.进口税

B.出口税

C.过境税

D.流转税
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单项选择题

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.

A．lack

B．since

C．big

D．lot
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