题目内容

词汇与结构Pressurization problems can seriously ______ the consciousness of the pilot.

A. disturb
B. impair
C. infer
D. affect

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词汇与结构If a controller fails, pack control switches ______ to the other controller.

A. electronically
B. manually
C. electrically
D. automatically

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 ______.

A. reiteration
B. retraction
C. restriction
D. reduction

词汇与结构Each pack can operate at reduced flow during certain some phases of flight to reduce fuel ________.

A. consumption
B. cost
C. expense
D. leakage

词汇与结构The cabin of an aircraft is pressurized by using engine bleed air, which is conditioned and ______into the cabin.

A. guided
B. altered
C. alternate
D. guess