航海英語(yǔ)狹水道、冰區(qū)與運(yùn)河航行單項(xiàng)選擇題每日一練(2019.01.22)

來(lái)源：考試資料網(wǎng)

1 A tug’s horsepower available at the shaft is（）.

2 An alternating light（）.

3 A strong back refers to a（）.

4 A stream of water immediately surrounding a moving vessel’s hull，flowing in the same direction as the vessel is known as（）.

5 You are on an ice-reinforced vessel about to enter packice. You should（）.