题目内容
The effort to place the aircraft in a flow is complicated by the following but _______.
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When the aircraft approaches its destination, the ACC is responsible for providing many destination airports with _______.
Flow restrictions often begin in the middle of the route, as controllers will ______ aircraft landing in the same destination so that when the aircraft are close to their destination they are sequenced.
The distance by which an aircraft avoids obstacles or other aircraft is termed _______.
The most important concept of IFR flying is that separation is maintained ________weather conditions.
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