航海英語(yǔ)船舶強(qiáng)度資料單項(xiàng)選擇題每日一練(2019.01.22)

來(lái)源：考試資料網(wǎng)

1 Generally，what is used to inflate liferafts?（）

2 Forty-five fathoms is marked on the anchor chain by（）.

3 Guide tolerances during elevation of the jack-up rig will（）.

4 Forces within a drilling unit have caused a difference between the starboard and port drafts. This difference is（）.

5 （）of my ship’s propeller is very strong.