题目内容
____aircraft designed for high-speed operation have difficulty generating enough lift at the low speeds during takeoff.
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These are therefore fitted with high-lift devices, often including slats and usually flaps, which increase the ____of the wing, making it more effective at low speed, thus creating more lift.
A ____will reduce the ground speed needed for takeoff, as there is a greater flow of air over the wings.
For a given aircraft, the takeoff speed is usually directly____ to the aircraft weight; the heavier the weight, the greater the speed needed.
Some aircraft specifically designed for short takeoff and landing can even become____ from a standing start when pointed into a sufficiently strong wind.
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