单项选择题
A.greasing B.greaseing C.greased D.greaser
Containers are loaded and discharged by（）.A. heavy derr...
单项选择题Containers are loaded and discharged by（）.
A. heavy derrick B. special cranes C. fork trucks D. winch
（）cargo must be kept away from dry cargo.A.WetB.HeavyC....
单项选择题（）cargo must be kept away from dry cargo.
A.Wet B.Heavy C.Light D.Dry
（）cargo is unloaded by large grain elevators.A.GeneralB...
单项选择题（）cargo is unloaded by large grain elevators.
A.General B.Liquid C.Drybulk D.Wet
