题目内容
词汇与结构In some emergency cases, the power used can then be increased to increase the aircraft's _________.
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词汇与结构Before takeoff, the engines, particularly piston engines, are routinely run up at high power to check for ________ problems.
词汇与结构For most aircraft, attempting a takeoff without a pitch-up would require ________ speeds while still on the runway.
词汇与结构_______ aircraft designed for high-speed operation have difficulty generating enough lift at the low speeds during takeoff.
词汇与结构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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