单项选择题
Mousing a cargo hook with marline or small line（）.
A.increases the lifting capacity of the hook B.protects the hook from the sling ring C.prevents the sling ring from coming out of the hook D.All of the above
单项选择题 Limber is a term associated with（）.
单项选择题 I’ve already put down the remarks DECK CARGO（）SHIPPER’S RISK in the Shipping Order．
单项选择题 In the stowage of deck cargo，cribbing is（）.
