【单选题】
集团客户网络服务等级协议规定银牌级客户的跨地市数据专线业务保障等级为___
A. 普通级
B. B.AAA级
C. C.AA级
D. D.A级
E.
F.
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答案
C
解析
暂无解析
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【单选题】
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(10)Which of the following statements is true?___
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【判断题】
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