[单选] A ship must report a collision with an aid to navigation maintained by the Coast Guard to which office?（）
A . Nearest Oceanographic office B . The Marine Safety Center at Coast Guard Headquarters C . National Ocean Service D . Nearest Officer in Charge，Marine Inspectio
战勤保障大队水带挂钩储备数量为50只。
高温气冷核电反应堆用氦气作冷却剂。
筹措短期资金的方式有（） 短期借款。 商业信用。 发行债券。 融资租赁。
高温气冷核电反应堆采用重水作为慢化剂。
下图标签的物品是哪一类别的危险品？（） 4.1。 4.2。 4.3。 4。
A ship must report a collision with an aid to navigation maintained by the Coast Guard to which office?（）
