题目内容:
SATAN,aprogramdesignedbyDanFannercanbeused( ).
A.toinvestigatethesecurityofInternetsites B.toimprovethesecurityoftheInternetsystem
C.topreventhackersfrombreakingintowebsites
D.todownloadusefulprogramsandinformation
参考答案:
答案解析: