单项选择题
Certain cargoes must be segregated because of their（）.
A.inherent characteristics B.weight C.destination D.danger to humans
单项选择题 Cargoes which（）an explosive，inflammable，poisonous and corrosive nature are called dangerous goods.
单项选择题 Can we change the location for the tung-oil（）that for the gum rosin?
单项选择题 Calcium carbide and acetone are counteractive（）nature.
