![](https://lstatic.shangxueba.com/jiandati/pc/images/pc_jdt_tittleico.png)
提问人:网友lixin080108
发布时间:2022-01-13
[单选题]
当井场硫化氢浓度达到()危险临界浓度时,现场施工人员应按照应急预案立即撤离井场
A.20ppm
B.50ppm
C.100ppm
![](https://lstatic.shangxueba.com/jiandati/pc/images/jdt_q_ckda.png)
![](https://lstatic.shangxueba.com/jiandati/pc/images/jdt_panel_vip.png)
C、100ppm
![](https://lstatic.shangxueba.com/jiandati/pc/images/jdt_q_wyda.png)
共位网友提供了参考答案,
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- · 有3位网友选择 C,占比37.5%
- · 有3位网友选择 B,占比37.5%
- · 有2位网友选择 A,占比25%
A.20ppm
B.50ppm
C.100ppm
A.220mg/m3(150m3/mL)
B.72mg/m3(50m3/mL)
C.150mg/m3(100m3/mL)
D.300mg/m3(200m3/mL)
A.A.30ppm
B.B.60ppm
C.C.80ppm
D.D.100ppm
A.A.50mg/m3
B.B.100mg/m3
C.C.150mg/m3
D.D.200mg/m3
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