航海英語甲板與船體保養(yǎng)單項選擇題每日一練(2019.01.17)

來源：考試資料網(wǎng)

1 Our jumbo boom can（）20 tons.

2 Pinching of the cargo hose between the vessel and the dock should be prevented by（）.

3 In plugging submerged holes on a vessel，rags，wedges，and other materials should be used in conjunction with plugs to（）.

4 You must ensure that lifesaving equipment is（）.

5 （）about 20 sq.m to be sand-blasted.