42. According to the relevant regulation, lifeboat should be powered by _______.
举一反三
- According to international aviation regulation, all the aircraft should install the autopilot system.
- How should the lifeboat sea painter be rigged?（）
- In launching a lifeboat，when should the tricing pendants be released?（）.
- If water is rising in the bilge of a lifeboat，you should FIRST（）.
- If you are forced to abandon ship in a lifeboat，you should（）.