单项选择题
A.cargo elevators B.conveyor belts C.ramps D.derricks and winches for cargo handling
Precautionary measures must be taken to（）safety of the ...
单项选择题Precautionary measures must be taken to（）safety of the stevedores，cargo and the ship.
A.insure B.ensure C.assure D.assume
Please stow the drums（）ends.A.atB.inC.onD.by
单项选择题Please stow the drums（）ends.
A.at B.in C.on D.by
Please choke up the drums to prevent（）.A.movingB.moveme...
单项选择题Please choke up the drums to prevent（）.
A.moving B.movement C.from the movement D.them from moving
