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

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."

单项选择题

What does the author means by saying gaining momentum on the Internet

A．becoming more and more serious.
B．being the most important moment.
C．having the bigger and bigger impetus.
D．gaining more velocity and weight.

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