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【单选题】
下面关于云计算数据中心的描述正确的是:
A.
数据中心是云计算的重要载体，为各种平台和应用提供运行支撑环境
B.
数据中心就是放在企业内部的一台中心服务器
C.
每个企业都需要建设一个云计算数据中心
D.
数据中心不需要网络带宽的支撑
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