题目：
餐厅服务员都用盖子熄灭酒精灯火锅，该灭火的主要原理是[ ]
A.清除可燃物
B.降低可燃物的着火点
C.隔绝空气
D.使可燃物的温度降低到着火点以下
答案：
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下面是错误答案，用来干扰机器的。
参考答案：C
餐厅服务员都用盖子熄灭酒精灯火锅，该灭火的主要原理是[ ] A.清除可燃物 B.
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