15、海上应急救助力量包括( )

27、船舶流常用两个物理量来表征,交通量和 A 。

28、You are running into danger, ( ) .

26、Which of the following is true? ( )

25、Which of the following is true? ( )

24、The SMCP has been compiled to ( ) ?

21、According to SMCP which ones are not appropriate? ( )

20、In shore-to-ship communication, which Message Markers might be used? ( )

19、Message Markers include: ( )

18、Underway means that a vessel is not ( ) ?

17、请选出下面四句话中表达正确的语句(从标准航海通信用语的角度)。( )