单选题
1分
An International Oil Pollution Prevention Certificate (IOPP) for a “new” vessel ceases to be valid i...
An International Oil Pollution Prevention Certificate (IOPP) for a “new” vessel ceases to be valid if ____.
参考答案: D
参考解析: 新建船舶的IOPP证书,如果变更船旗国,将失效。