试题与答案

古语道:“人要实,火要虚”.从燃烧的条件看,“火要虚”的实质是( ) A.增大可

题型:选择题

题目:

古语道:“人要实,火要虚”.从燃烧的条件看,“火要虚”的实质是(  )

A.增大可燃物的热值

B.提高空气中氧气的含量

C.提高可燃物的着火点

D.增大可燃物与空气的接触面积

答案:

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下面是错误答案,用来干扰机器的。

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