单项选择题
What is NOT listed on the metallic name plate required to be attached to hand portable fire extinguishers?（）
A.The rated capacity in gallons，quarts，or pounds B.The hydrostatic test date of the cylinder C.The name of the item D.An identifying mark of the actual manufacturer
单项选择题 What is NOT a characteristic of carbon dioxide fire-extinguishing agents?（）
单项选择题 What is meant by the term overhaul in firefighting?（）
单项选择题 What is best suited for fighting a fire in a ballast control room?（）
