WebSQL is a SQL-like (6) language for extracting information from the web. Its capabilities for performing navigation of web (7) makes it a useful tool for automating several web-related tasks that require the systematic processing of either all the links in a (8) , all the pages that can be reached from a given URL through (9) that match a pattern, or a combination of both. WebSQL also provides transparent access to index servers that can be queried via the Common (10) Interface.
A．Router
B．Device
C．Computer
D．Gateway
参考答案：D
解析：
[分析]： WebSQL是一种能从web中提取信息的类似SQL的查询(query)语言。WebsQL具有从 Web超文本(Hypertext)执行导航的能力，这使它成为一个非常有用的工具，可以自动处理多个与Web相关的任务。这些任务要求一页(page)中所有链接能被系统地处理，所有的页面都能通过一个给定的URL到达，这URL是通过模式匹配或两者结合的路径(paths)得到的。 WebSQL还提供了通过通用网关(Gateway)接口来透明地访问索引服务器的功能。