[单选] On vessels over 100 gross tons，whose responsibility is it to ensure that all able seamen in the vessel’s crew have the documents and qualifications required by law and regulation?（）
A . Master of the vessel B . USCG Officer in Charge of Marine Inspection C . Owner or operator of the vessel D . Company's personnel director
战勤保障大队强制送风呼吸器储备数量为1台。
宽带骨干网络的分组交换技术有哪些？
战勤保障大队氧气呼吸器储备数量为5具。
中国文化与外域文化的第二次大交汇，开端于（） 清朝康熙年代。 明朝万历年间。 清朝乾隆年间。 明朝永乐年间。
宽带通信技术主要分为哪两个层面的技术？
On vessels over 100 gross tons，whose responsibility is it to ensure that all able seamen in the vessel’s crew have the documents and qualifications required by law and regulation?（）
