Cribbing is（）. A.wooden blocks or dunnage
题型：单项选择题
问题：
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