航海英語消防演習與作業(yè)單項選擇題每日一練(2019.01.13)

來源：考試資料網

1 CO₂ cylinders，which protect the small space in which they are stored must（）.

2 Foam is a very effective smothering agent and（）.

3 A fire in the galley ALWAYS poses the additional threat of（）.

4 Except in rare cases，it is impossible to extinguish a shipboard fire by（）.

5 How does foam extinguish an oil fire?（）.