题目内容

词汇与结构The flight controls are powered by redundant hydraulic sources: system A and system B. _________ hydraulic system can operate all primary flight controls.

A. Either
B. Any
C. Another
D. Both

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词汇与结构If the aileron control system is jammed, force applied to the First Officer’s control wheel provides roll control from the spoilers. The ailerons and the Captain’s control wheel are _________.

A. functional
B. inoperative
C. available
D. manageable

词汇与结构The aircraft take advantage of aerodynamic _________ to travel through the air by means of primary and secondary flight control surfaces which are operated by flight controls in the cockpit.

A. loads
B. sources
C. abilities
D. forces

词汇与结构Flap 15 is normally limited to airports _________ approach climb performance is a factor.

A. where
B. when
C. which
D. that

词汇与结构__________ excessive structural loads from increased Mach at higher altitude, flap extension above 20,000 feet should not be attempted.

A. To reduce
B. To protect
C. To prevent
D. To eliminate