航海英語航海英語綜合練習(xí)單項選擇題每日一練(2019.01.10)

來源：考試資料網(wǎng)

1 A carbon dioxide fire extinguisher should be recharged（）.

2 0n a crane ,the boom indicator tells the operator what angle the boom angle is compared to the（）.

3 Instructions for on-board maintenance of each life-saving appliance shall not include（）.

4 Who can suggest changes to the SMS?（）

5 Vessel towing with the current shall（）tow more than two boats and they must be towed alongside.