單項選擇題

Send a fire （）(火勢探測員) to see the situation .

A.detect
B.detector
C.watch
D.inspector

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單項選擇題

Close the port side （）(通風(fēng)口) .

A.ventilators
B. designated station
C. fire outfit

單項選擇題

The emergency alarm is sounded on （）(汽笛) according to master’s order.

A.VHF
B.whistle
C.broadcast
D.sextant