乙炔与空气混合时,爆炸极限为()
A.22 ~81%
B. 2.2 ~81%
C.2.2 ~8.1%
D.2.2 ~18%
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正确答案: B 答案分析:无
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B. 2.2 ~81%
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B. 2.2 ~81%
C.2.2 ~8.1%
D.2.2 ~18%