在 OSI 参考模型中有 7 个层次,提供了相应的安全服务来加强信 ******** 下哪一 层提供了抗抵赖性?
A、表示层B
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翻译:Byron’sfather,byhisfirstmarriage,hadadaughter,Augusta,Byron-sister.’shalf
句子写作:HeisverybusypreparingIELTS.Hehasnotimetoplay.
Idiomsnominalinnaturehavea(n)______asthekeywordineachandfunctionasanouninsentences.
AllplaysarealiketomejustasallmusicisaliketoTony.()
Thedoctorsare________abouttheguidelinesunderwhichtheycancarryouteuthanasia.