相关题目
When flying in the mountainous area, and there is strong wind or strong updraught/downdraught, the aircraft should maintain at least （ ） meters minimum safety altitude from the obstacles.
Helicopters can operate at a height between 1 and 10 meters with 10 meters distance from obstacles, but its flying speed should not exceed （ ） km/h.
The flight time refers to （ ） .
Landing time refers to （ ） .
Takeoff time refers to （ ） .
Aircraft without oxygen equipment or whose oxygen equipment is unserviceable are not supposed to fly above （ ） m.
The in-flight personnel on board an unpressurized aircraft should start to use oxygen at the altitude of （ ） m.
The aircraft shall be informed when it is approaching the point of interception of the glide path and, just before intercepting the glide path, it shall be instructed to begin its descent and （ ） .
When control of the aircraft is assumed by the radar controller in charge of the precision approach, a communications check shall be made on the channel to be used during the precision approach and the pilot shall be advised that （ ） of transmission is required.
The spare fuel for the flight is determined by weather, A/C performance, range and distance of the alternate airport. For the domestic transport flight with alternate airport, if landing at the destination airport is not possible, the A/C should have （ ） minutes endurance or more when flying over the farthest alternate airport.
