问题
单项选择题
When using carbon dioxide to fight a fire on a bulkhead，the CO2 should be applied（）.
A.first to the bottom of the flaming area，sweeping from side to side，and following the flames upward
B.in a circular motion from the middle of the bulkhead outward
C.to the top of the flaming area，sweeping from side to side，and working toward the bottom
D.in an up-and-down motion from one side of the bulkhead to the other
答案
参考答案：A