单项选择题

Why are mischief makers called "Black Hats"

A．Because they wear black hats.
B．Because they act in a dishonest way.
C．Because they are magicians.
D．Because they appear in the night.
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According to the passage, which of the following statements in NOT true
A．The Internet entrepreneurs were trying their best to cope with Google's top engineers.
B．For the Web sites without a well-known domain name. those rankings mean nothing.
C．In the worst cases, the offending Web sites are deleted from the index.
D．There is no definite troth in the search results from the Web.
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Why do some companies populate their sites with many incoming links from others
A．It increases the volume of information in the webpage.
B．It increases the popularity of the site.
C．It makes the site much more informative.
D．It makes the site seemingly more authoritative and popular.
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