单项选择题

It is clear that Steve Wozniak, Bill Gates and Linus Torvalds are ______.

A．all good examples of today's computer users
B．driving by greed, power, revenge, or some other malicious intent
C．to push programs beyond what they are designed to do
D．all dead
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单项选择题
It can be inferred from the passage that ______.
A．employees will keep up with security polices and awareness if they are highly-trained
B．the rate of security attacks appears faster than the growth of the Internet
C．one's computer system will always be secure
D．vulnerabilities cannot go through phones, wireless devices
单项选择题
It is recommended in the passage as a security measure that people should ______.
A．turn off network services
B．employ a full-inspection firewall
C．make sure that servers and applications are combined
D．eliminate all the programs
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