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．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．

A．illness

B．virus

C．weakness

D．attachment

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