相关题目
When the controller wants to ensure the validity of the Mode C altitude readout, he may say “（ ） at 7,500”.
The controller will normally issue taxi instructions to the pilot （ ） ．
After landing, the pilot should switch to ground control （ ） ．
In the case that the missed approach is initiated by the pilot, “（ ）” shall be transmitted．
In order to save taxiing time for training purpose pilots may request to make a “touch and go”, which means the aircraft （ ） ．
An aircraft should be handed over from one ACC to another （ ）minutes before it flies over the hand-over point.
It is occasionally necessary to cancel the takeoff clearance due to （ ） ．
It is important to ensure that the phraseology employed during the taxi maneuvers cannot be interpreted as a takeoff clearance since （ ） ．
Some aircraft may be required to carry out （ ） prior to departure and are not always ready for takeoff when reaching the holding point．
When several runways are in use and there is any possibility that the pilot may be confused as to which one to use, the （ ） should be stated in the takeoff clearance．
