单项选择题

A．general pessimism about
B．some doubt about
C．different interpretations of
D．much optimism about
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单项选择题
A．make computer users aware of hackingB．train hacking expertsC．enlighten people on how to prevent computer attacksD．display the harms of hacking
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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