单项选择题
A.tank top B.compartment between the tank top and shell of the vessel C.inner side of the vessel's shell D.space between two transverse bottom frames
The flood stream here is at an average rate of 0.8（）.A....
单项选择题The flood stream here is at an average rate of 0.8（）.
A.cables B.miles C.kilometers D.knot
The construction portfolio may be included as part of t...
单项选择题The construction portfolio may be included as part of the ship（）.
A.general plans B.operating manual C.builders documentation D.CCS file
The circular steel structure installed around the prope...
单项选择题The circular steel structure installed around the propeller of a towboat is the（）.
A.nozzle B.shroud C.strut D.hood
