A.corrosive B.class B poison C.oxidizer D.explosive
A.Increasing the length of the towing hawser B.Trimming the tow by the bow C.Trimming the tow by the stern D.Drogues put over the stern
A.make underwater repairs to barges B.determine if the air in a tank is safe for men C.enter areas that may contain dangerous fumes or lack oxygen D.resuscitate an unconscious person
A.INTERNATIONAL LOADLINE CERTIFICATE B.PASSENGER SHIP SAFETY CERTIFICATE C.CARGO SHIP SAFETY CONSTRUCTION CERTIFICATE D.GENERAL DECLARATION
A.a fictitious sun moving along the celestial equator B.the visible sun moving along the ecliptic C.the Moon's motion in relation to the Sun D.the movement of the first point of Aries
A.a cargo that will be damaged if it gets wet B.bulk liquids C.cargoes that will cause condensation D.liquids in containers
A．回波相位差 B．回波信号包络 C．多普勒频移 D．电磁波信号
A.If B.Provided that C.Should D.When
A.remain B.remaining C.be remaining D.be remained
A．收紧船舶缆绳 B．加压载水 C．防止货件移动 D．以上均可
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