（）is the most liable to spontaneous combustion.

单项选择题An inflatable liferaft is floating in its container，attached to the ship by its painter，as the ship is sinking rapidly. Which action should be taken with respect to the liferaft container? （）

A.Cut the painter line so that it will not pull the liferaft container down
B.Swim away from the container so that you will not be in danger as it goes down
C.Take no action as the pull on the painter will cause the liferaft to inflate and open the container
D.Manually open the container and inflate the liferaft with the hand pump

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

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

单项选择题After you enter Thimble Shoal Channel，you will alter course to pass between Trestle “A” and “B”. Which channel should you use?（）

A.Thimble Shoal Main Channel or the South Auxiliary Channel
B.Any of the channels but keep to the right hand side
C.The South Auxiliary Channel
D.Thimble Shoal Main Channel

单项选择题All of the following are part of the fire triangle EXCEPT（）.

A.fuel
B.electricity
C.oxygen
D.heat