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单选题
727.系统中用来引导和分配空气的部分。包括设备架冷却系统和项目,如鼓风机、喷头、管道、进口、单向活门等,不包括增压和温度控制部分的活门。( )
A
That portion of the system used to induct and distribute air. Includes equipment rack cooling systems and items such as blowers, scoops, ducting, inlets, check valves, etc. Does not include valves which are part of pressurization and temperature control.
B
That portion of the system used to inductivity and distribute air. Includes equipment rack cooling systems and items such as blowers, scoops, ducting, inlets, one way valves, etc. Does not include valves which are part of pressurization and temperature control.
C
That portion of the system use induct and distribute air. Includes unit rack cooling systems and items such as exhaust, scoops, ducting, inlets, check valves, etc. Does not include valves which are part of pressurization and temperature control.
答案解析
正确答案：A
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