单项选择题
Fire extinguishers on inspected vessels are numbered by size I through V，with I being（）.
A.used for electrical fires only B.the smallest C.the most accessible D.the most effective
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（）.
单项选择题 Fire alarm system thermostats are actuated by（）.
