航海英語救生設(shè)備單項選擇題每日一練(2019.01.06)

來源：考試資料網(wǎng)

1 The boat command that means complete the stroke and level the oars horizontally with the blades trimmed fore and aft is（）.

2 Oily rags stored in a pile that is open to the atmosphere are a hazard because they may（）.

3 A sheave is a（）.

4 Frapping lines are fitted to lifeboat davits to（）.

5 According to the regulations for lifeboat falls，which action must be taken with the falls no later than 5-year intervals?（）