相关题目
The atmosphere contains approximately 78% of （ ） ．
Priority indicator QD in SITA represents（ ）.
Aerodrome information should not be passed to aircraft （ ） ．
When the controller specifies “stop altitude squawk”, the pilot should respond by （ ） ．
The controller will issue instructions using the phrase “（ ）” in cases where the Mode C altitude readout differs significantly from the altitude reported by the pilot.
A typical transponder has four windows which can be set to any number between （ ） . This gives a total of 4,096 possible codes.
The “blips” of light on the radar screen are called raw radar （ ） ．
The coded signal transmitted by the （ ） mounted on the radar antenna, causes the aircraft transponder to reply automatically with a specific coded signal.
（ ） is the airborne portion of the secondary surveillance radar system.
Which secondary radar code below is right?
