单项选择题
Before loading bulk grain，bilge wells must be covered to（）.
A.add strength to the bilge well strainer B.permit rapid flow of water to the bilge wells C.prevent cargo sifting into the bilge wells D.prevent oil，water，or other liquid from reaching the cargo
单项选择题 Bags are usually stowed in between the bulk grain（）.
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?（）.
