航海英語(yǔ)海上通信基本知識(shí)單項(xiàng)選擇題每日一練(2019.01.11)

來(lái)源：考試資料網(wǎng)

1 Routine radio communications should be no more than（）.

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

3 She arrived at the anchorage last night and anchored（）berth.

4 Sorry to have kept you（）for a long time.

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