单项选择题

Compared with SoBig. F, Blaster was a virus that was______.

A．more destructive
B．more humorous
C．less vulnerable
D．less noticeable
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单项选择题
By Gossip also is a form of social bonding (Para. 5), Professor Aaron Ben-Ze'ev means gossip______.
A．is a valuable source of social information
B．produces a joy that most people in society need
C．brings people the feel of being part of a group
D．satisfies people's need of being unusual
单项选择题
From the text we learn that Welchi ______.
A．is a wicked worm causing as many damages as Blaster did
B．is a program designed by Haley to detect worms like Blaster
C．is a program intended to fix the infected machines
D．is a worm meant to defeat the virus with "pings"
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