問題詳情

4. A fireman's outfit carried onboard cargo vessels must have a __________ .
(A) combustible gas indicator
(B) self-contained breathing apparatus
(C) canister-type gas mask
(D) fresh air breathing apparatus

參考答案

答案:B
難度:適中0.5
統計:A(1),B(1),C(0),D(0),E(0)

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