单项选择题

Badtrans-B is______

A．an anti-virus program
B．an expert on viruses
C．an anti-virus company
D．a new virus found

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单项选择题

The main idea of the second paragraph is______

A．how to avoid double-click on infected email attachments
B．how emails both carry and spread viruses and worms
C．what new viruses can automatically launch themselves
D．what new viruses are capable of with an double-click on

单项选择题

Which of the following would the virus SirCam usually arrive entitled

A．"Business plan."
B．"Fw: Funky pictures -- check it."
C．Anything as in the title of the Word file.
D．"I send you this file in order to have your advice."

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