单项选择题
Fire extinguishing agents used on Class C fires must be（）.
A.able to absorb heat B.water based C.nonconducting D.nontoxic
单项选择题 Fire extinguishers on inspected vessels are numbered by size I through V，with I being（）.
单项选择题 Fire extinguishers of sizes III，IV，and V are designated as（）.
单项选择题 Fire and abandon ship stations and duties may be found on the（）.
