航海英語船員職務(wù)名稱單項(xiàng)選擇題每日一練(2019.01.06)

來源：考試資料網(wǎng)

1 （）is not convincing at all.

2 Fighting a rig fire in a watertight compartment with hoses could reduce the stability of the rig by（）.

3 Each fire hose coupling on a ship must have threads that meet the specifications of the（）.

4 Each hand portable，semi-portable and fixed fire extinguishing unit on a ship must be tested and inspected at least once every（）.

5 Don’t（） this news to the public until we give you the go-ahead.