航海英語(yǔ)海上通信基本知識(shí)單項(xiàng)選擇題每日一練(2019.01.26)

來(lái)源：考試資料網(wǎng)

1 Automatic identification systems (AIS) are required to（）.

2 The range of a SSB transmission is MOST affected by（）.

3 That ship arrived there（）6 p.m.yesterday.

4 A message by flashing light consists of the call，the text，the ending，and the（）.

5 A rigid replica of the International Code flag A may be shown by a vessel（）.