题目内容
词汇与结构Pack output is increased automatically during high pack demand periods to compensate for a failed pack or recirculation fan, or is limited during high bleed air demand periods such as for gear ______.
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词汇与结构Each pack can operate at reduced flow during certain some phases of flight to reduce fuel ________.
词汇与结构The cabin of an aircraft is pressurized by using engine bleed air, which is conditioned and ______into the cabin.
词汇与结构The amount and pressure of the conditioned air is regulated by a computer and _____ valves.
词汇与结构Passengers with conditions such as a pneumothorax are advised not to fly until fully ______ ; pain may still be experienced in the ears and sinuses by people suffering from a cold or other infection.
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