航海英語船員職務(wù)名稱單項(xiàng)選擇題每日一練(2019.01.21)

來源：考試資料網(wǎng)

1 （）for many years，the AB passed the examination and became an officer.

2 During which condition should the operator of a pedestal crane shutdown operations?（）

3 （）is not convincing at all.

4 Each hand portable fire extinguisher on a ship must be marked with（）.

5 During which condition should the operator of a pedestal crane shutdown operations?（）