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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单项选择题
The word dupe in the last sentence of the second paragraph is the closest in meaning to
A．copy
B．cheat
C．develop
D．decide
单项选择题
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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