单项选择题
A stage should only be rigged（）.
A.over the bow or stern of a vessel
B.over the flat sides of a vessel
C.over the open water
D.over the dockside
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相关考题
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单项选择题
A squeeze-grip type carbon dioxide portable fire extinguisher has been partially discharged. It should be（）.
A.replaced in its proper location if weight loss is no more than 15%
B.replaced in its proper location if weight loss is no more than 25%
C.labeled empty and recharged as soon as possible
D.labeled empty and replaced in its proper location regardless of weight -
单项选择题
A special daymark is a（）.
A.red-and-white octagon
B.daymark with a yellow stripe on it
C.green square
D.yellow diamond -
单项选择题
A spanner is a （）.
A.cross connection line between two main fire lines
B.special wrench for the couplings in a fire hose line
C.tackle rigged to support a fire hose
D.None of the above
