单项选择题
Which of the following is not dangerous cargo?（）
A. Coal. B. Explosive cargo. C. Flammable cargo. D. Poisonous cargo.
单项选择题 Which of the following cargo is not carried in refrigerated ships?（）
单项选择题 Many types of general cargo are now carried in （）.
单项选择题 Many types of （）cargo are carried in containers.
