单项选择题
A.corrosive B.flammable gas C.flammable liquid D.nonflammable gas
Another name for coal naphtha that would appear on a da...
单项选择题Another name for coal naphtha that would appear on a dangerous cargo manifest is（）.
A.benzene B.tar C.middle oil D.toluene
All of our export dangerous goods are（）the standard.A.o...
单项选择题All of our export dangerous goods are（）the standard.
A.on B.over C.up to D.above of
All of our export dangerous cargo is（）examined before s...
单项选择题All of our export dangerous cargo is（）examined before shipment.
A.though B.through C.thorough D.thoroughly
