题目内容
词汇与结构As the airplane _____ from cruise to landing, there can be multiple, narrow regions of altitudes and airspeeds where the vibration level can become severe.
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词汇与结构In general, airframe vibrations can best be reduced by descending and ________ airspeed.
词汇与结构After descending and reducing airspeed, the existing vibration level is unacceptable, and if it is impractical to further reduce airspeed, the vibration level may be_____ to a previous, lower level by a slight increase in airspeed.
词汇与结构Engine indications are ______ on the center instrument panel by the Engine Instrument System.
词汇与结构When the round red warning light above the indicator is illuminated, it ______ the limit for the engine parameter displayed below it has been reached or exceeded.
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