单项选择题
Limber is a term associated with（）.
A.emergency gear B.drainage C.deck cargo atorage D.securing gear
单项选择题 Litmus paste is used in order to determine（）.
单项选择题 Making cargo plan for appropritate distribution of the cargo on board is（）duty.
单项选择题 Manifest and cargo plan are the two most important shipping papers required for（）.
