航海英語安全用語單項(xiàng)選擇題每日一練(2019.01.25)

來源：考試資料網(wǎng)

1 The radiotelegraphy safety messages for condition indicating distress，urgency and safety，respectively，are（）.

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

3 In battery charging rooms，ventilation should be provided（）.

4 A message warning of a tropical storm should be sent as a(n)（）.

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

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