题目内容
(请给出正确答案)
[单选题]
硫化氢浓度小于()应挂绿牌
A.30mg/m3(20ppm)
B.75mg/m3(50ppm)
C.150mg/m3(100ppm)
D.15mg/m3(10ppm)
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A.30mg/m3(20ppm)
B.75mg/m3(50ppm)
C.150mg/m3(100ppm)
D.15mg/m3(10ppm)
A.15mg/m3(10ppm)
B.30mg/m3(20ppm)
C.150mg/m3(100ppm)
A.30mg/m3(20ppm)
B.20mg/m3(30ppm)
C.3mg/m3(2ppm)
D.2mg/m3(3ppm)
A.一级报警值应设置在10ppm
B.三级报警值应设置在100ppm
C.二级报警值应设置在20ppm
D.二级报警值应设置在10ppm