单项选择题
Each crewmember has an assigned firefighting station. This assignment is shown on the（）.
A.fire fighting plan B.shipping articles C.Certificate of Inspection D.muster list
单项选择题 An advantage of an ABC dry chemical over a carbon dioxide extinguisher is（）.
单项选择题 After using a Halon extinguisher，it should be（）.
单项选择题 After using a C02 portable extinguisher，it should be（）.
