单项选择题
Liquid bulk cargo is loaded and discharged by （）(泵).
A.pipes B.tubes C.buckets D.pumps
单项选择题 （）(湿货)must be kept away from dry cargo.
单项选择题 This is （）(甲板货).
单项选择题 Persons who load and discharge ships are called （）(装卸工人).
