單項選擇題In handing break bulk hazardous materials , it is forbidden to use（）.

A.cargo nets
B.metal bale hooks
C.pallets
D.slings


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1.單項選擇題In launching a lifeboat,when should the tricing pendants be released?（）.

A.Before the boat is lowerd from the stowage position
B.As soon as the boat-fall blocks clear the davit head
C.After the limit switch is activated
D.After all people have been embarked

2.單項選擇題In nautical terminology a dog is a（）.

A.crow bar
B.device to force a water tigh door against the frame
C.heavy steel beam
D.wedge