问题
单项选择题
Viruses can’t be transmitted by (19) and (20) is not a common route for virus infiltration.
A) pirated softwareB) email attachments
C) anti - virus software D) shareware
答案
参考答案:C
解析: 盗版软件、电子邮件附件以及文件共享都是计算机病毒传播的常用途径。