航海英語船體設(shè)備單項(xiàng)選擇題每日一練(2019.01.10)

來源：考試資料網(wǎng)

1 A contra-guide is a type of（）.

2 Bilge keels are fitted on ships to（）.

3 A carling is used aboard ship（）.

4 The strake on each side of the keel is called a（）.

5 The purpose of cant frames in steel vessels is（）.