词汇与结构A _______ will reduce the ground speed needed for takeoff, as there is a greater flow of air over the wings.
A. windshear
B. downwind
C. headwind
D. microburst
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词汇与结构For a given aircraft, the takeoff speed is usually directly____ to the aircraft weight; the heavier the weight, the greater the speed needed.
A. same
B. addictive
C. proportional
D. opposite
词汇与结构Some aircraft specifically designed for short takeoff and landing can even become ____ from a standing start when pointed into a sufficiently strong wind.
A. failed
B. banked
C. unstable
D. airborne
词汇与结构The takeoff speed required varies with air density, aircraft gross weight, and aircraft ____ (flap and/or slat position, as applicable).
A. shape
B. control
C. system
D. configuration
词汇与结构This relationship between temperature, altitude, and air density can be expressed as a _______ altitude, or the altitude in the International Standard Atmosphere at which the air density would be equal to the actual air density.
A. density
B. actual
C. relative
D. geographical