4.Which of the following statements is true?( )

发布于 2021-04-24 15:34:50
【单选题】
A The meeting in March 1999 did not produce any results
B In August 2000, ICAO, FAA and United Airlines contracted with NASA to conduct at FFC a study of the six methods
C Longer taxiing contributes to runway incursions
D None of the above

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