单项选择题
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
The bow thruster generally is ineffective at（）.A.over 3...
单项选择题The bow thruster generally is ineffective at（）.
A.over 3 knots headway B.at any speed astern C.at any speed ahead D.over 1 knot sternway
