高等继续教育 / 计算机专业英语
正确率：100%
题型描述: 多选题
( ) maybe a certain cause that some viruses infect upon.
A.a day
B.a time
C.a counter within the virus
D.an external event on your PC
( ) maybe a certain cause that some viruses infect upon.
A.a day
B.a time
C.a counter within the virus
D.an external event on your PC
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