航海英語(yǔ)安全用語(yǔ)單項(xiàng)選擇題每日一練(2019.01.23)

來(lái)源：考試資料網(wǎng)

1 Three SHORT BLASTS mean（）.

2 Keep clear（）the buoy.

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

4 According（）the report，the ship hit the wharf when berthing.

5 Which method is used to detect rot in manila lines?（）