题目内容

词汇与结构With total hydraulic power failure, the ailerons can be mechanically positioned by rotating the pilot’s control wheels. Control forces are higher due to friction and _________ loads.

A. aerodynamic
B. stable
C. mechanical
D. structural

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词汇与结构The flaps and _________ are high lift devices that increase wing lift and decrease stall speed during takeoff, low speed maneuvering and landing.

A. elevators
B. rudder
C. ailerons
D. slats

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

A. deflection
B. extension
C. retraction
D. modification

词汇与结构Before the airplane begins to move, thrust must be _____.

A. exerted
B. reduced
C. increased
D. maintained

词汇与结构As long as the thrust continues to be greater than the drag, the airplane continues to _____.

A. decelerate
B. advance
C. move
D. accelerate