单项选择题
No outlet on a fire hydrant may point above the horizontal in order to（）.
A.avoid kinking the hose B.avoid personal injury during connection C.make connecting easier D.prevent spray on electrical equipment
单项选择题 Which statement is TRUE concerning spare charges for portable fire extinguishers on unmanned tank barges?（）.
单项选择题 A cabinet or space containing the controls or valves for the fixed firefighting system must be（）.
