当被测气体或蒸汽的爆炸下限小于()时,其被测浓度应不大于 ;当被测气体或蒸汽的爆炸下限大于或等于 时,其被测浓度应不大于 ;
(A)0.4%,0.5%;0.4%,0.2%
(B)0.4%,0.2%;0.4%,0.5%
(C)4%,0.2%;4%,0.5%
(D)4%,0.5%;4%,0.2%
参考答案
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(A)0.4%,0.5%;0.4%,0.2%
(B)0.4%,0.2%;0.4%,0.5%
(C)4%,0.2%;4%,0.5%
(D)4%,0.5%;4%,0.2%