SoBig. F damaged computer programs mainly by _____. From the text we learn that Welch _____.

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问题 SoBig. F damaged computer programs mainly by _____.
From the text we learn that Welch _____.

选项 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".

答案C

解析 细节题。根据第五段内容可知,Welch是一种修补被感染电脑程序的软件。
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