In order to ensure the safety of the ship and its equipment during UMS operation， certain essential functions （）.
举一反三
- The pilot in command of an aircraft is the person _______ the aircraft who is responsible for its operation and safety during flight.
- 19. What are essential to ensure the effective implementation of the ship security plan?
- 中国大学MOOC: I’m certain a high-volume order can ensure a big profit margin.
- Permanent magnetism is caused by（）. A: operation of electrical equipment and generators on board ship B: the earth's magnetic field affecting the ship's hard iron during construction C: the horizontal component of the earth's magnetic field acting on the horizontal soft iron D: the vertical component of the earth's magnetic field acting on the vertical soft iro
- The United States Postal Service has a system to ensure its employees' safety句子中的关键词是: