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【多选题】关于存储整合描述正确的是？（）
A.
存储整合可以降低IT系统的复杂度
B.
存储整合可以简化操作，便于管理维护
C.
存储整合将所有数据放在一个存储设备里，增加了数据安全风险
D.
存储整合可以帮用户提高存储利用率，降低总体拥有成本
【单选题】Subways are underground trains, which usually operate 24 hours a day. They are found in larger cities and usually run between the suburbs and the downtown area. Maps and schedules are available from t...
A.
within downtown areas
B.
away from city centers
C.
in or outside big modern cities
D.
between suburbs and city centers