单项选择题
A.是权利B.是义务C.既是权利又是义务D.既非权利又非义务
A.went away his hatB.went his hat awayC.away went his hatD.away his hat went
A.数字化B.全球化C.信息化D.网络化
A.可靠性B.可变性C.可通用性D.可共享性
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