Many "free" sites are not really free on the Web - you often pay by receiving e-mail and promotional materials from the site.
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Q1: An example of Web pages that are
Q2: Because most companies and individuals freely give
Q3: An Intelligent Search Agent is also called
Q4: Some periodicals, like The Times or The
Q5: The visible Web is the portion of
Q7: Portals that are limited by subject are
Q8: "Yellow page" directories on the Web are
Q9: One of the purposes of popular periodicals
Q10: Most of the "yellow page" directories on
Q11: Libraries and "virtual libraries" are good places
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