单项选择题
Bags are usually stowed in between the bulk grain（）.
A.to ventilate the hold B.to separate the cargo C.to replace shifting boards D.to facilitate stowage
单项选择题 Atmospheres laden with coal dust or grain dust caused by loading these cargoes（）.
单项选择题 A venetian vent or rice ventilator is used in stowage of which cargo?（）.
单项选择题 A grapnel is a（）.
