A.The unit is working properlyB.The face mask is not se……

单项选择题After launching，an inflatable raft should be kept dry inside by（）.

A.opening the automatic drain plugs
B.draining the water pockets
C.using the electric bilge pump
D.using the bailers and cellulose sponge

单项选择题A vessel in distress should send by radio telephone the two tone alarm signal followed immediately by the（）.

A.distress position
B.spoken words Mayday，Mayday，Mayday
C.ship's name
D.ship's call letters

单项选择题A distress signal（）.

A.consists of 5 or more short blasts of the fog signal apparatus
B.may be used separately or with other distress signals
C.consists of the raising and lowering of a large white flag
D.is used to indicate doubt about another vessel's intentions

单项选择题AS SOON AS I HAVE FURTHER INFORMATION I WILL MAKE ANOTHER ANNOUNCEMENT. I ASK YOU KINDLY TO REMAIN CALM. THERE IS NO DANGER AT THIS TIME. These words are likely from（）.

A.the captain of a vessel in distress
B.representative of ship owners
C.an officer from port authorities
D.the pilot of a vessel entering a port in foreign country

单项选择题ALL PASSENGERS OF DECK NO.2 ARE REQUESTED TO FOLLOW THE CREW MEMBERS WHO WILL ESCORT YOU TO YOUR ASSEMBLY STATIONS. From this sentence you can concluded that the vessel is in（）.

A.immediate danger to collide with another vessel
B.a situation in which more passengers will embark on board
C.berth and ready to disembark her passengers
D.distress