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简述导游服务概念的涵义?

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空调滤芯使用一段时间不及时保养,不会产生的影响()

A. 空调出风口吹出的空气流量显著减小
B. 活性炭过滤功能会减退
C. 容易滋生细菌,出现堵塞现象
D. 鼓风机不工作

喷砂时,点驱动安全阀操作较快,而且在所有工作环境中都较安全

A. 正确
B. 错误

车辆制动机按动力源于控制方法分为()机,电空制动机,手用制动机,真空制动机.

A storage specialist is discussing the customer’s high availability plan and discovers that they areonly 80 kilometers (50 miles) from the intended site. They require 7 x 24 x 365 data availability in aUNIX environment with an RPO of two minutes. They have two DS5300 systems located at bothsites. Which of the following IBM storage functions best meets the customer’s businesscontinuance requirements?()

A. HACMP
B. Volume copy
C. Metro Mirror
D. Global Mirror

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