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

The passage is mainly about

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

单项选择题

Thirty days after the librarian was given the notice, she had to ______.

A．take her revenge on the company
B．leave her job
C．erase all the company's records
D．admit her mistake