单项选择题
A.First aid kit
B.Axe or cutting torch
C.Fire extinguisher
D.Chafing gear
单项选择题 When should a fire be ventilated?（）
单项选择题 When possible，what should be the FIRST step in combating a fire on deck resulting from a cargo overflow or a leaking cargo line?（）
单项选择题 When possible，what is the FIRST step in fighting an engine fuel-pump fire which results from a broken fuel line?（）