关于水平安定面主电配平的配平范围，正确的是？ A: 0.25-12.5units(flap retracted) B: 2.5-12.6units(flap extended) C: 2.5-12.5units(flap retracted) D: 0.25-12.5units(与襟翼位置无关)

这些操纵面是液压作动的，并且只在起飞和降落时展开或收回。 A: These control surfaces are hydraulically supplied and are only extended or retracted during take off and landing. B: These control surfaces are hydraulically moved and are only extended or retracted during take off and landing. C: These control surfaces are hydraulically powered and are only extended or retracted during take off and landing.

Those old buildings were ______ to make room for a new shopping center. A: rattled B: reproved C: retracted D: razed

词汇与结构 In case of landing with a retracted nose-wheel, the pilot should hold the nose off the ground until almost ________ has been applied.

A belly landing or gear-up landing is when an aircraft lands without its landing gear fully ------------. A: extend B: extended C: retract D: retracted

Lesson 16 听力选择-1[音频] A: The flaps is jammed B: The undercarriage is jammed C: The nose gear cannot be extended D: The landing gear cannot retracted

If the landing gear is ____, the pilots are supposed to advise the cabin crew to perform emergency landing procedures and to brief passengers on evacuation procedures. A: retracted B: extended C: congested D: jammed