問題詳情

【題組】37.What is true about a Mayday call? .
(A) A pilot will call “]Mayday, Mayday, Mayday” to show emergencya.
(B)OhIj airplane pilots can use it,
(C)“Mayday”, is a call pilots have to make.
(D)It eame from a pilot at Croydon Airport in 1923.

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