A.the direction the storm has come from
B.the direction in which the storm is moving
C.the speed at which the storm is moving
D.the path taken by the storm
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A.required to give way in a crossing situation
B.required to sound the first passing signal in a meeting situation
C.free to maneuver in any crossing or meeting situation as it has the right-of-way
D.required to maintain course and speed in a crossing situation but may take action to avoid collision
A.over the bow or stern of a vessel
B.over the flat sides of a vessel
C.over the open water
D.over the dockside
A.replaced in its proper location if weight loss is no more than 15%
B.replaced in its proper location if weight loss is no more than 25%
C.labeled empty and recharged as soon as possible
D.labeled empty and replaced in its proper location regardless of weight
A.red-and-white octagon
B.daymark with a yellow stripe on it
C.green square
D.yellow diamond
A.cross connection line between two main fire lines
B.special wrench for the couplings in a fire hose line
C.tackle rigged to support a fire hose
D.None of the above
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A type of precipitation that occurs only in thunderstorms with strong convection currents that convey raindrops above and below the freezing level is known as（）.
A squeeze-grip type carbon dioxide portable fire extinguisher has been partially discharged. It should be（）.
A swift current occurring in a narrow passage connecting two large bodies of water，which is produced by the continuously changing difference in height of tide at the two ends of the passage，is called a（）.
A tow can override its tug as a result of（）.
A tug is best positioned for towing and maneuvering on rivers and other restricted waters where wave action is limited when（）.
A stage should only be rigged（）.
A tow of 9 barges is made up three abreast by three long. The towboat is faced up to the last barge of the center string. The outer two strings of barges are the（）.
A stretch where the channel changes from one side of the river to the other is called a （）.
A tug may be in danger of tripping when（）.
A slow rise in the barometric pressure forecasts（）.