A vessel is proceeding downstream in a narrow channel on the Western Rivers when another vessel is sighted moving upstream. Which vessel has the right of way? （） The vessel moving upstream against the current。 The vessel moving downstream with a following current。 The vessel located more towards the channel centerline。 The vessel with the least amount of maneuverability。
机舱或其它舱室着火，火势迅猛，人员根本无法接近，最好的灭火战术是“防护周围”。
存在计算机中的证书、报告副本应该经实验室最高领导批准后修改。（）
及时定下决心，迅速组织战斗是灭火指挥的原则之一。
在船舶火灾事故调查中，勘查各种物质所处在的不同部位的烧损情况，属于动态勘查。
A tug’s horsepower available at the shaft is（）.
