单项选择题
A. oil fire B. electrical fire C. common fire D. special fire
Are all hoses and equipment ready（）?A. for useB. to use...
单项选择题Are all hoses and equipment ready（）?
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
