22. Which system below has the capability of extinguishing fire onboard ships?
(A) Lifesaving system
(B) Sprinkler system
(C) Propulsion system
(D) Communication system
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統計: A(85), B(172), C(29), D(18), E(0) #3407491
統計: A(85), B(172), C(29), D(18), E(0) #3407491