单项选择题 Experience shows that where signs of rust on steel shipments are apparent at the time of shipment，Mates-Receipts and Bills of Lading need not necessarily in all cases be（）with the single word “rusty”.

单项选择题 Certain cargoes must be segregated because of their（）.

单项选择题 Cargo that gives off fumes that may contaminate other cargo is known as a(n)（）.