单项选择题
A.does not change B.improves rapidly C.improves only slightly D.becomes poor
After the initial cleaning of flue gas in an inert gas ...
单项选择题After the initial cleaning of flue gas in an inert gas system the gas is passed through what device for final cleaning?（）
A.Scrubber B.Demister C.Deck water seal D.Final filter
After sending a message describing the symptoms of an i...
单项选择题After sending a message describing the symptoms of an ill crew member，you receive a message containing the code MRL. This means “（）”.
A.Apply ice-cold compress and renew every 4 hours B.Commence artificial respiration immediately C.Give enema D.Pass catheter into bladder
After reporting a casualty to a mobile offshore drillin...
单项选择题After reporting a casualty to a mobile offshore drilling unit，which record must be retained on board? （）
A.Record of drafts B.Hull reports C.Anchor record D.Machinery repair book
