单项选择题
A. Lower B. Top C. Hoist D. Take down
Before the operation of the derrick, check all （）(索具)cl...
单项选择题Before the operation of the derrick, check all （）(索具)closely and everything must be in good condition.
A.blocks B.goosenecks C.tackle D.guys
The（）(地脚货) must be bagged.A. bagged cargoB. delicate ca...
单项选择题The（）(地脚货) must be bagged.
A. bagged cargo B. delicate cargo C. sweepings D. inboard cargo
As a sailor on duty you must know how to （）(调整)derricks...
单项选择题As a sailor on duty you must know how to （）(调整)derricks.
A. taken in B. slack off C. adjust D. send out
