阿摩線上測驗
30 A coast guard says ________ three times when making a distress call indicating imminent danger to life or vessel.
(A)“Mayday”
(B)“Pan-Pan”
(C)“Roger”
(D)“SOS”
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統計： A(68), B(11), C(7), D(9), E(0) #3462284
統計： A(68), B(11), C(7), D(9), E(0) #3462284
