26.應急信號中,綜合警報為鳴汽笛或警鈴一短聲,並至少連放幾分鐘?
(A)1
(B)2
(C)3
(D)4
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統計: A(7), B(2), C(0), D(0), E(0) #2400377
統計: A(7), B(2), C(0), D(0), E(0) #2400377