29. In case of emergency _____ will be given with the ship’s whistle and the alarm system.
(A) two short blasts and three prolonged blast
(B) three short blasts and two prolonged blast
(C) one short blasts and seven prolonged blast
(D) seven short blasts and one prolonged blast
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統計: A(14), B(20), C(26), D(108), E(0) #2440075
統計: A(14), B(20), C(26), D(108), E(0) #2440075