题目内容
Before takeoff, the engines, particularly piston engines, are routinely run up at high power to check for ____ problems.
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The term ___＿is used because the aircraft pivots around the axis of its main landing gear while still on the ground, usually due to manipulation of the flight controls to make this change in aircraft attitude.
For most aircraft, attempting a takeoff without a pitch-up would require____speeds while still on the runway.
____aircraft designed for high-speed operation have difficulty generating enough lift at the low speeds during takeoff.
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.
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