A.being rigged combined
B.is rigged combining
C.rigs combining
D.is rigged combined
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A.should be worn while fighting a fire
B.can be used in atmosphere deficient in oxygen
C.filter contaminants from air that is to be breathed
D.may be substituted for a self-contained breathing apparatus
A.settle near the bottom of the blige
B.settle near the top of the bilge
C.settle evenly throughout all levels of the bilge by mixing with air
D.disperse to atmosphere
A.sweep flames away with water spray
B.shut off the leak
C.use a chemical foam fire extinguisher
D.call t e local fire department
A.Non-toxic gas
B.oxygen
C.Hydrogen
D.Helium
A.towing bridle
B.main weather cover
C.external lifelines
D.righting strap
最新試題
Despite the rising importance and great convenience of the gyrocompass,the magnetic compass still retain its importance because of its（）.
Manoeuvring information can not be obtained from（）.
Fog is likely to occur when there is little difference between the dew point and the（）.
The ISM code is part of（）.
Which of the following is not a form of precipitation?（）
The company should establish and maintain procedures to control all documents and date which are relevant to（）.
Your vessel is docking, but not yet alongside. Which line will be the most useful when maneuvering the vessel alongside the pier?（）.
The helm command PORT TWENTY means（）.
When steering by autopilot,how often should the steering be checked?（）
What is a CORRECT reply to a pilot’s request, How’s your heading?（）