单项选择题
A. for use B. to use C. in use D. of use
The foam extinguisher should be used （）.A. in the endB....
单项选择题The foam extinguisher should be used （）.
A. in the end B. upside down C. down side D. on top
A fire extinguisher is used for （）fires.A. stoppingB. p...
单项选择题A fire extinguisher is used for （）fires.
A. stopping B. putting out C. putting D. finishing
Who is in charge of oil spilling ? （）A. Second officer....
单项选择题Who is in charge of oil spilling ? （）
A. Second officer. B. Third officer. C. Captain. D. Bosun.
