A.stopper
B.screen
C.filter
D.restrictor
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A.rising warm air
B.proximity to a low pressure area
C.inward spiraling circulation
D.clear dry weather
A.Has there been
B.Have there been
C.Has there
D.Have there
A.From
B.By
C.on
D.With
A.Have
B.Has
C.Is there
D.Are there
A.Have
B.Has
C.Has there been
D.Are there
最新試題
A head-on situation at night is one in which you see dead ahead a vessel showing（）.
A frame with two，or sometimes four，arms through which are threaded the guidelines and which is used to keep the drill stem and bit in line with the center opening in the temporary guide base is the（）.
A safe fuel system must（）.
After sending a message describing the symptoms of an ill crew member，you receive a message containing the code MRL. This means（）.
A hand held instrument used to measure distances between objects and the ship is a（）.
An inert gas system installed on a tanker is designed to（）.
It is not necessary to declare（）in MARITIME HEALTH DECLARATION.
A heavy，thick-walled tube，usually steel，used between the drill pipe and the bit in the drill stem to weight the bit in order to improve its performance is called a（）.
All ships（）suspected infectious disease on board should radio information to Port Health Officer.
A large metallic device，mounted directly in the piping (usually located at the dock near the point where the vapor hose is attached)，designed to prevent the passage of a rapidly moving flame through the piping is called a（）.