单项选择题
Litmus paste is used in order to determine（）.
A.innage B.thievage C.ullage D.the tank's datum point
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（）.
单项选择题 Many dangerous cargoes are stowed on deck becaused of the（）.
