单项选择题
Each hose in the fuel transfer system for helicopter refueling must meet the standards of the（）.
A.Federal Aviation Administration B.Corps of Engineers C.National Fire Protection Association D.National Transportation Safety Board
单项选择题 Each hand portable fire extinguisher must be marked with（）.
单项选择题 Each fireman’s outfit and its spare equipment on a vessel must be stowed（）.
单项选择题 Each fire pump on a ship must have a pressure gauge located at（）.
