● The （72） in e-mail messages has affected almost every computer around the world and has caused the damage of up to US$1 billion in North America.（72）A. illnessB. virusC. weaknessD. attachment

● The （72） in e-mail messages has affected almost every computer around the world and has caused the damage of up to US$1 billion in North America.

（72）

A. illness

B. virus

C. weakness

D. attachment

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