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问题 单项选择题

某病人左侧舌前2／3味觉障碍，左舌下腺及左下颌下腺分泌障碍，左眼不能闭合，左侧额纹消失，左鼻唇沟消失，口角偏向右侧。该病人的病变可能在（）

A.左舌神经

B.左面神经核

C.左面神经与脑干相连处

D.右侧皮质核束

E.右侧面神经

答案

参考答案：B

单项选择题

下面有关施工图预算的说法错误的是（）。

A．施工图预算的编制对象是单项工程，因此也称单项工程预算

B．施工图预算的编制方法有工料单价法和综合单价法

C．实物法编制施工图预算所用的人工、材料和机械台班的单价都是当时当地的实际价格

D．施工图预算通常分为建筑工程预算和设备安装工程预算两大类
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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．relation

B．field

C．script

D．tuple
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