单项选择题
A.equipment B.apparatus C.extinguishers D.machines
Fires can be divided into different （）.A.kindB.kindsC.t...
单项选择题Fires can be divided into different （）.
A.kind B.kinds C.types D.B+C
We are loading dangerous cargo, no （）, please.A.smokeB....
单项选择题We are loading dangerous cargo, no （）, please.
A.smoke B.smoked C.smoking D.to smoke
If there is a fire on board, inform the bridge and give...
单项选择题If there is a fire on board, inform the bridge and give the （）at once.
A.sound B.sounding C.alarm D.signal
