71. How many GMDSS radio operators are needed／required on board according to the provisions of the International Convention for the Safety of Life at Sea，1974？
举一反三
- 34. The safety of Life at Sea Convention was developed by the __________
- A Convention about safety of life at sea was adopted in 1974 which included a new amendment procedure, according which an amendment shall enter into force（） A: after being accepted by more than two thirds of the Parties B: after being accepted by more than half of the Parties C: within a specified period of time with no objections D: within a specified period of time with no exceptio
- According to the UN Convention on Contracts for the International Sale of Goods, which are the basic factor of an offer
- How many steps are required to develop a good measurement according to Dr. Fan Daisy? A: 4 B: 9 C: 10 D: 8
- How many judges are required for the event of dressage? ( )