An advantage of a dry chemical over a carb
题型：单项选择题
问题：
An advantage of a dry chemical over a carbon dioxide fire extinguisher is its（）.
A.greater range
B.effectiveness on all types of fires
C.cleanliness
D.All of the above
题型：单项选择题
An advantage of a dry chemical over a carbon dioxide fire extinguisher is its（）.
A.greater range
B.effectiveness on all types of fires
C.cleanliness
D.All of the above
