单项选择题

A．make computer users aware of hacking
B．train hacking experts
C．enlighten people on how to prevent computer attacks
D．display the harms of hacking
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单项选择题
A．It is a spectator sport.B．It is fun to win.C．It is what he exactly likes.D．It is a professional sport.
A．It is a spectator sport.
B．It is fun to win.
C．It is what he exactly likes.
D．It is a professional sport.
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