单项选择题
A.large crates or cases B.small curved items C.drums D.filler cargo
A.solid yellow B.white with orange geometric shapes C.red and white vertically-striped D.green and red horizontally-banded
A.Tanks for the storage of drinking water B.Ballast tanks to prevent the boat from capsizing C.A hydraulic start diesel engine D.Auxiliary mechanical propulsion (Fleming gear)