问题
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
答案
参考答案：B
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Cargoes which（）an explosive, inflammable, poisonous and corrosive nature are called dangerous goods.
A.is
B.are of
C.is of
D.are
参考答案：B