单项选择题A.24B.27C.18D.20
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
单项选择题A.2B.3C.4D.5
单项选择题A.oneB.twoC.fourD.six
单项选择题A.durationB.momentumC.prospectD.future