单项选择题

Securing cargo by running timbers from an upper support down to the cargo，either vertically or at an angle，is called（）.

A.braces
B.dunnage
C.shores
D.toms

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Roll-on／roll-off ships are equipped with（）.A.cargo elev...

单项选择题Roll-on／roll-off ships are equipped with（）.

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

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