单项选择题
A deck beam does NOT（）.
A.act as a beam to support vertical deck loads B.lessen the longitudinal stiffness of the vessel C.act as a tie to keep the sides of the ship in place D.act as a web to prevent plate wrinkling due to twisting action on the vessel
单项选择题 （）are to be used for dunnage if you load rice.
单项选择题 When loading a cargo of taconite，proper sequencing of loading by hatch number is necessary to （）.
单项选择题 Prior to being able to sail in a US port，each vessel that carries grain in bulk must have a certificate of loading issued by the（）.
