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问题 单项选择题

编制投资估算时，生产能力指数法是根据（）来估算拟建项目投资额的方法。

A．已建类似项目的投资额和生产能力

B．己建类似项目总投资

C．己建类似项目的总生产能力

D．已建类似项目设备费

答案

参考答案：A

选择题

十一届三中全会以后，中 * * 党人对“什么是社会主义，怎样建设社会主义”进行了积极的探索。这种探索的主要成果有

①发展多种所有制经济②坚持以经济建设为中心③逐步实现社会主义现代化

④实行“一个国家、两种制度”⑤民族区域自治制度⑥独立自主的和平外交政策[ ]

A．①②③④    

B．④⑤⑥    

C．①③⑤    

D．②③④⑤
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单项选择题

One of the difficulties in building an SQL-like query language for the Web is the absence of a database (131) for this huge, heterogeneous repository of information. However, if we are interested in HTML documents only, we can construct a virtual schema from the implicit structure of these files. Thus, at the highest level of (132) , every such document is identified by its Uniform Resource Locator (URL), and a (133) and a text. Also, Web severs provide some additional information such as the type, length, and the last modification date of a document. So for data mining purposes, we can consider the set of all HTML documents as a relation:
Document (url, rifle, text, type, length, modif)
Where all the (134) are character strings. In this framework, an individual document is identified with a (135) in this relation. Of course, if some optional information is missing from the HTML document, the associate fields will be left blank, but this is not uncommon in any database.

A．table

B．title

C．driver

D．event
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