单项选择题


A．also
B．again
C．still
D．or so
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单项选择题
The passage is mainly about______
A．why computer criminals are often able to escape punishment
B．why computer crimes are difficult to detect by systematic inspections
C．how computer criminals manage to get good recommendations from their former employers
D．why computer crimes can' t be eliminated
单项选择题
Under what circumstance the computer criminals may escape without detected according to the author in the second paragraph
A．If they hooked to computer anonymously.
B．If they are clever enough.
C．If they know how to operated computer.
D．If no one checks up on what the computer is doing.
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