单项选择题
A.outside B.under C.beside D.besides
On hearing the fire signal, the crew should proceed imm...
单项选择题On hearing the fire signal, the crew should proceed immediately to （）their assigned duties.
A. carry on B. put out C. carry out D. take off
Efficient fire-fighting drill demands the full （）of per...
单项选择题Efficient fire-fighting drill demands the full （）of persons in all departments of the ship.
A.operate B.operation C.co-operate D.co-operation
The signals that will be used for emergency should be c...
单项选择题The signals that will be used for emergency should be clearly （）.
A. set out B. set off C. get off D. cut off
