单项选择题
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
Rice is usually in （）.A.drumsB.casesC.bagsD.tanks
单项选择题Rice is usually in （）.
A.drums B.cases C.bags D.tanks
