单项选择题
A venetian vent or rice ventilator is used in stowage of which cargo?（）.
A.Bagged cargo B.Bulk grain C.Bulk rice D.Refrigerated goods
单项选择题 A grapnel is a（）.
单项选择题 A deck beam does NOT（）.
单项选择题 （）are to be used for dunnage if you load rice.
