单项选择题
A.away from galleys，living quarters，or navigation spaces
B.only from areas equipped with power ventilation systems
C.from the open deck
D.isolated from sources of vapor ignition
单项选择题 Prior to magnetic particle inspection of anchor chain，the chain should be（）.
单项选择题 Pollution regulations require that each scupper in an enclosed deck area have a（）.
单项选择题 Owing to the greater girth of a ship amidships than at the ends，certain strakes are dropped as they approach the bow and stern to reduce the amount of plating at the ends. These strakes are called（）.