试题与答案

用汽油一空气吹管熔金器熔化中熔合金时,熔化金属的最佳火焰层是() A.混合焰 B.燃

题型:单项选择题 A1型题

题目:

用汽油一空气吹管熔金器熔化中熔合金时,熔化金属的最佳火焰层是()

A.混合焰

B.燃烧焰

C.还原焰

D.氧化焰

E.还原焰及氧化焰

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

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