×
单选题
3211. Those units and components store, regulate, and deliver oxygen to the passengers and crew, including bottles, relief valves, shut-off valves, outlets, regulators, masks, etc
A
那些组件和部件存储、调节并向旅客和机组输送氧气,包括气瓶、释压活门、关断活门、出口、调节器、面罩等。
B
气瓶、释压活门、关断活门、出口、调节器、面罩等组件和部件储存氧气,并将调节后的氧气提供给乘客和机组。
C
那些旅客和机组氧气系统的相关组件和部件存储、调节、输送氧气,包括气瓶、释压活门、关断活门、出口、调节器、面罩等。
答案解析
正确答案：A
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