围绝经期女性出现的一系列神经内分泌变化，其病生理学基础是（）

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问题单项选择题 A1/A2型题

A.下丘脑功能退化

B.垂体功能退化

C.卵巢功能衰退

D.子宫萎缩

E.精神因素

答案

参考答案：C

单项选择题

The low operating costs of the foreign company will ______ the high labor costs the business pays in its own country.

A．offend

B．obstruct

C．oblige

D．offset

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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．schema

B．platform

C．module

D．relation

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