單項(xiàng)選擇題The（）schemeinadatabasesystemisresponsibleforthedetectionoffailuresandfortherestorationofthedatabasetoastatethatexistedbeforetheoccurrenceofthefailure.

A.query
B.test
C.check
D.recovery


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6.單項(xiàng)選擇題TCP/IP（）arethestandardsaroundwhichtheInternetwasdeveloped.

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C.object-oriented
D.aspect-oriented

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