单项选择题


A．instead
B．and
C．though
D．as
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单项选择题
It can be concluded from the first paragraph that______.
A．it is still impossible to detect computer crimes today
B．computer crimes are very serious in the operation of financial institutions
C．computer criminals can escape punishment because they can't be detected
D．people commit computer crimes at the request of their company
单项选择题
It is implied in the third paragraph that______.
A．many more computer crimes go undetected than are discovered
B．the rapid increase of computer crimes is a troublesome problem
C．most computer criminals are smart enough to cover up the crimes
D．most computer criminals who are caught blame their bad luck
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