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问题 单项选择题 A1型题

髓室由几个面组成（）

A.2个面

B.3个面

C.4个面

D.5个面

E.6个面

答案

参考答案：E

解析：考点：髓室的结构。髓室：髓腔位于牙冠和牙根颈部分，分顶、底和四壁，共6个面。故本题选E。

选择题

下列除去杂质的方法中，正确的是（　　）

选项物质杂质除杂质的方法
A稀盐酸氯化钠加入适量的氢氧化钠溶液
B铜粉铁粉加入足量的稀盐酸溶解、过滤、洗涤
C二氧化碳一氧化碳点燃
D三氯化铁溶液氯化铜加入过量铁粉、过滤

A．A

B．B

C．C

D．D
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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.

（75）（）

A.modify

B.changing

C.modifying

D.changed
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