问题描述：
下面这段对话是什么意思?
Didn't you install any anti-virus software?Or did you use any USB flash disk that might be possibly infected by viruses?
Of course I did.
它是反义疑问句还是什么句?回答时有什么规则?
Of course I did.But I had used my USB flash disk in my office before I came.
Didn't you install any anti-virus software?Or did you use any USB flash disk that might be possibly infected by viruses?
Of course I did.
它是反义疑问句还是什么句?回答时有什么规则?
Of course I did.But I had used my USB flash disk in my office before I came.
问题解答：
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