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.
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.
举一反三
- 词汇与结构 The roll control surfaces consist of hydraulically powered ailerons and flight spoilers which are controlled by _________ either control wheel.
- 词汇与结构 If the jam exists during the landing phase, higher forces are required to generate sufficient elevator control to _________ for landing.
- 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
- An overloaded aircraft may bring damage to the structure of the landing gear during the phase of landing.
- 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