單項(xiàng)選擇題Cribbing is（）.

A.wooden blocks or dunnage placed between a deck load and the deck
B.the chains and shackles used to secure a deck cargo
C.a crate in which a deck cargo is packaged
D.cardboard separation pieces placed between deck loads to prevent chafing


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1.單項(xiàng)選擇題Compared to manila line，size for size，nylon line（）.

A.has less strength than manila line
B.has more strength than manila line
C.is equivalent to manila line
D.will rot quicker than manila line

2.單項(xiàng)選擇題Chafing gear is used to（）.

A.anchor the boat
B.pick up heavy loads
C.protect fiber rope from abrasion
D.strengthen mooring lines