题目内容

词汇与结构The primary flight control system uses __________ control wheel, column and pedals linked mechanically to hydraulic power control units which command the primary flight control surfaces.

A. controversial
B. modern
C. conventional
D. modernized

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词汇与结构The flight controls are powered by _________ hydraulic sources: system A and system B.

A. another
B. abundant
C. other
D. redundant

词汇与结构The secondary flight controls, high lift devices _________ of trailing edge flaps and leading edge flaps and slats, are powered by hydraulic system B.

A. consist
B. are consisted
C. consisting
D. is consisted

词汇与结构_________ hydraulic system B fails, the trailing edge flaps can be operated electrically.

A. In the charge
B. In the event
C. In order that
D. In place of

词汇与结构_________ certain conditions the power transfer unit automatically powers the leading edge devices

A. On
B. At
C. Over
D. Under