航海英語安全用語單項(xiàng)選擇題每日一練(2019.01.13)

來源：考試資料網(wǎng)

1 Deficient oxygen content inside a chain locker can be detected with（）.

2 You see an iceberg that has not been reported. What kind of radio message do you transmit to warn others?（）.

3 In the International Code of signals，a group of three letters indicates（）.

4 The ship will be（）demurrage soon.

5 Which term describes a part of a natural fiber line?（）