航海英語燃燒與爆炸單項(xiàng)選擇題每日一練(2019.01.24)

來源：考試資料網(wǎng)

1 Controls for a fixed carbon dioxide system shall be mounted（）.

2 Each fire hydrant must have at least one spanner and at least one（）.

3 CO₂ extinguishes a fire by（）.

4 A definite advantage of using water as a fire extinguishing agent is its characteristic of（）.

5 If，during helicopter refueling operations，fuel is spilled on clothing，the person should first（）.