● 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
题目
● 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