問題詳情

3.Two minutes after takeoff, the pilots reported an engine flameout and immediately sent out a(n)_____ signal.
(A)extravagant
(B)mayday
(C)deciduous
(D)gratuitous

參考答案

答案:B
難度:適中0.650794
統計:A(5),B(41),C(9),D(4),E(0)

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