题目内容

词汇与结构It is then expanded and cooled to a suitable temperature by passing it _____a heat exchanger and air cycle machine.

A. through
B. with
C. across
D. into

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词汇与结构Recirculation fans ______the packs to maintain a constant ventilation rate through the cabin.

A. resist
B. assist
C. desist
D. subsist

词汇与结构Hot trim air from the bleed air system is added to the pack conditioned air to _____the temperature in each zone.

A. increase
B. obtain
C. evaluate
D. control

词汇与结构The fans draw cabin air through____, then reintroduce the air into the conditioned air distribution system.

A. milers
B. meters
C. fillers
D. filters

词汇与结构The flight deck receives 100% fresh conditioned air from the left pack only, and is ______ at a slightly higher pressure than the passenger cabin to prevent smoke from entering the flight deck.

A. maintained
B. reduced
C. sustained
D. returned