单项选择题
A cargo that has a stowage factor over 40 is known as a（）.
A.hygroscopic cargo B.measurement cargo C.stowage cargo D.weight cargo
单项选择题 A carling is used aboard ship（）.
单项选择题 A change of trim may be simply defined as（）.
单项选择题 A cofferdam is（）.
