单项选择题

Why are the transactions in many banks claimed to be safe

A．Because they are handled by computers.
B．Because humans are not allowed to operate computers.
C．Because there are no mistakes what so ever.
D．Because computers do not steal money.

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单项选择题

What can we infer from the passage

A．Minor employers are more likely to commit crimes.
B．Crimes committed by computer experts are difficult to detect.
C．Computer criminals are usually from the cold regions.
D．There are too many criminals for the police to catch.

单项选择题

The passage is mainly about

A．computer crimes
B．banking via computer
C．computer errors
D．computer businesses