A.Appropriateuseofbackupmediaandoffsitestorage
B.Thedisasterrecoverytestingprocess过程
C.Classifyingsystemsaccordingtooperationalimpact
D.Useappropriatefiresuppressantsystems
参考答案：B
AAppropriateuseofbackupmediaandoffsitestorageBThedisasterr
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