OLED是什么？
Fire protection regulations for towing vessels require that all crew members participate in drills and receive instruction at least once a month. Who is responsible for ensuring that this takes place?（） The Officer in Charge，Marine Inspection。 The Master，or person in charge of the vessel。 The vessel's owner or manager。 The company's port captain or port engineer。
Which of the following operations need to be entered on the Oil Record Book Part I? （） (1) Ballast of fuel oil tanks (2) Condition of oil discharge monitoring and control system （1）only。 （2）only。 both（1）and（2）。 neither（1）nor（2）。
什么是二次搬运费？
战勤保障大队抢险救援服储备数量为50套。
财务杠杆效应是指（）
