单项选择题
During loading or discharging, the tallymen must make contact with（）on duty so as to solve problems in time.
A.ship owner B.ship's officers C.shippers D.consignors
单项选择题 During the process of loading, damages to cargo can be reduced to minimum by（）.
单项选择题 Filler cargo refers to（）.
单项选择题 Flame screens are used to（）.
