A.vernier
B.psychrometer
C.hygrometer
D.stadimeter
您可能感興趣的試卷
你可能感興趣的試題
A.information or regulatory buoy that has lateral significance
B.buoy that is off-station and is marked to warn mariners of its wrong position
C.dual purpose marking used where the ICW and other waterways coincide
D.buoy that was set in error and will be replaced with a red nun buoy
A.drill stem guide
B.guide frame
C.drill string frame
D.casing guide
A.increasing the righting moment
B.decreasing the vessel's displacement
C.increasing the reserve buoyancy
D.shifting the CG (center of gravity) off center
A.one control
B.two controls
C.three controls
D.none of the above
A.anchored
B.underway but not fishing
C.tending a small fishing boat
D.fishing by trawling
最新試題
A fixed carbon dioxide extinguishing system for a machinery space，designed WITHOUT a stop valve in the line leading to the protected space，is actuated by（）.
A safe fuel system must（）.
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（）.
A fire has broken out on the stern of your vessel. You should maneuver your vessel so the wind （）.
All ships（）suspected infectious disease on board should radio information to Port Health Officer.
After sending a message describing the symptoms of an ill crew member，you receive a message containing the code MRL. This means（）.
An inert gas system installed on a tanker is designed to（）.
How could lashing gear used aboard Ro-Ro vessels be stowed when not in use? （）
A jack-up drilling unit elevated on the Outer Continental Shelf must have a fog horn that will sound（）.
A fishing vessel casualty must be reported to the Coast Guard if it involves（）.