题目内容

Aircraft approaching from the north must make visual contact with the airport at a ______ altitude than a flight approaching from the south, because of rapidly rising terrain south of the airport.

A. lower
B. same
C. higher
D. different

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The minimum conditions for the aircraft to take off and land vary according to the type of navigation aids available, the location and height of terrain and obstructions _________ of the airport, etc.

A. in the front of
B. at the center of
C. in the vicinity of
D. at the back of

______ is a backup system providing a last layer of defense if a sequence of errors or omissions causes a dangerous situation.

A. TAWS
B. EFIS
C. GPS
D. EICAS

In the United States even when on a filed IFR flight plan, if conditions permit the _______ is responsible to maintain a watch for, and avoid other air traffic and obstructions.

ATC
B. pilot
C. engineer
D. TCAS

Which one is not included in the radio beacons on the ground?

A. VORs
B. NDBs
C. GPS
D. GPWS