A.rotor blades and landing gear
B.unloading of passengers
C.loading of cargo
D.pilot's visibility
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A.prevent the generation of flammable or combustible gas in tanks
B.blow out cargo lines to prevent the build up of gas concentrations
C.dilute tank atmospheres to keep gas concentrations below the lower explosive limit
D.prevent fires in the pumproom by continually displacing flammable vapors
A.aid in the stripping and cleaning of cargo tanks
B.increase the rate of discharge of cargo
C.force toxic and explosive fumes from a cargo tank to vent to the outside atmosphere
D.lower the oxygen levels inside cargo tanks，making explosion nearly impossible
A.with
B.has
C.have
D.had
A.Apply ice-cold compress and renew every 4 hours
B.Commence artificial respiration immediately
C.Give enema
D.Pass catheter into bladder
A.prevent engine overheating
B.have proper air/gasoline fuel mixture ratio
C.be liquid- and vapor-tight
D.supply sufficient air to the intake manifold
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An inert gas system on a tanker should be used to（）.
A fire pump may be used for other purposes if（）.
A jack-up drilling rig being towed must（）.
Please supply 200 tons of fresh water（）my ship.
How could lashing gear used aboard Ro-Ro vessels be stowed when not in use? （）
A flooded leg on a liftboat would adversely affect the vessel’s stability underway by（）.
Entries should be made in a Ro-Ro vessel’s cargo-securing device record book for（）.
A large valve，usually installed above the ram preventers，that forms a seal in the annular space between the pipe and wellbore or，if no pipe is present，on the wellbore itself is called the（）.
A fishing vessel casualty must be reported to the Coast Guard if it involves（）.
Permanent magnetism is found in（）.