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单选题
150 Those units and components which store,regulate,and deliver oxygen to the passengers and crew, including bottles, relief valves, shut-off valves, outlets, regulators, masks, etc.
A
储存,分配并向乘客和机组提供氧气的组件和部件,包括氧气瓶,释压活门,关断活门,出口,调节器,烟雾罩等。
B
储存,调节并向乘客和机组提供氧气的组件和部件,包括氧气瓶,释压活门,关断活门。出口,调节器,面置等。
C
储存,分配并向乘客和机组提供氧气的组件和部件,包括氧气瓶,释压活门,关断活门,出口,调节器,面置等。
答案解析
正确答案：B
