单项选择题
A.inherent characteristics B.weight C.destination D.danger to humans
Cargoes which()an explosive,inflammable,poisonous and c...
单项选择题Cargoes which()an explosive,inflammable,poisonous and corrosive nature are called dangerous goods.
A.is B.are of C.is of D.are
Can we change the location for the tung-oil()that for t...
单项选择题Can we change the location for the tung-oil()that for the gum rosin?
A.by B.for C.into D.with
Calcium carbide and acetone are counteractive()nature.A...
单项选择题Calcium carbide and acetone are counteractive()nature.
A.by B.in C.from D.with