单项选择题

The best title of this passage is ______.

A．An American Poet
B．Song of Myself
C．Walt Whitman
D．Walt Whitman--Poet of American Democracy
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单项选择题
According to the passage, all the damage listed below could be done by a hacker EXCEPT ______.
A．entering into computers illegally
B．creating many electronic-age terms
C．removing computer systems
D．going through computer systems
单项选择题
By saying Now exists the possibility of terrorism by computer , the writer means that ______.
A．some employees may erase information from payroll files
B．students who send out a "virus" may do damages to thousands of computers
C．some people may spread fear in public by destroying computer systems
D．some terrorists are trying to contact each other using electronic mails
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