单项选择题
A.carpenter B.rating C.electrician D.bosun
Sailors should know the （）(安全工作负荷量)of derricks.A. safe ...
单项选择题Sailors should know the （）(安全工作负荷量)of derricks.
A. safe working load B. safety work load C. safe work load D. safe working loading
Liquid bulk cargo is loaded and discharged by （）(泵).A.p...
单项选择题Liquid bulk cargo is loaded and discharged by （）(泵).
A.pipes B.tubes C.buckets D.pumps
（）(湿货)must be kept away from dry cargo.A. Light cargoB....
单项选择题（）(湿货)must be kept away from dry cargo.
A. Light cargo B. Wet cargo C. Heavy cargo D. Deck cargo
