关于一级分行数据中心机房等级设定，以下说法正确的有（）。

A.一级分行数据中心机房作为省域核心业务前置处理与渠道汇聚中心，一旦风险发生对客户服务与经营管理产生的影响是区域性的、造成的损失是重大的

B.一级分行数据中心机房等级设定为二级机房

C.一级分行全部系统建设均必须参照A级机房标准

D.一级机房主要系统（如电气、空气调节、消防系统等）建设参照A级机房标准，部分系统建设参照B级机房标准

（）of the following need not be entered in the official logbook?

A.The testing of the internal combustion engine driven emergency generator at least once each month the vessel is navigated

B.The testing of storage betteries for emergency lighting and systems once each 6 months the vessels is navigated

C.The actual draft when the vessel arrives in salt water after department a port

D.The testing of the line-throwing appliance once every 3 months