止血带止血法，由于紧缠血带会使血液不流通，时间久了肢体会坏死，故每隔（）分钟要放松一次。

根据标准航海通信用语，关于“GMDSS”，下列正确的是 () .

根据标准航海通信用语,下列哪个选项()是在播报全球海上遇险和安全系统标准遇险/紧急/安全报告时必须发布的？

"根据标准航海通信用语,在与船舶进行拼读通信时，按规定下列拼读正确的是()？

"At sea you sight two red lights. This would indicate ()

" A radio medical advice service () ships of all nationalities and no charge is made for this service.

" A DECK, SPACE, AREA, ETC. , NOT PERMITTED TO BE ENTERED FOR SAFETY REASONS defines().

"A dead reckoning (DR) plot ().

" A continual worsening of the list or trim(吃水差) indicates().

"()is an angle at which a cargo settles in the hold of a ship，between the horizontal and the slope made by a bulk cargo such as grain or iron ore.

"()is the most visible signal of distress from a lifeboat at sea in the daytime.