航海英語遇險(xiǎn)用語單項(xiàng)選擇題每日一練(2019.01.13)

來源：考試資料網(wǎng)

1 After putting on a self-contained breathing apparatus，you open the air supply and hear a continuous ringing of a bell. What does this mean?（）.

2 If you log a distress message，it must include the（）.

3 After launching，an inflatable raft should be kept dry inside by（）.

4 By regulation，orange smoke distress signals will expire not more than how many months from the date of manufacture?（）

5 When two vessels are in immediate danger of collision，the stand-on vessel must（）.