航海英語探火與消防設(shè)備單項(xiàng)選擇題每日一練(2019.01.13)

來源：考試資料網(wǎng)

1 A combination or all-purpose nozzle produces（）.

2 After extinguishing a fire with CO₂，it is advisable to（）.

3 A portable foam (stored-pressure type) fire extinguisher would be most useful in combating a fire in（）.

4 No outlet on a fire hydrant may point above the horizontal in order to（）.

5 As an extinguishing agent，foam（）.