(单选题)
对于江河水系的监测断面,当水面宽为100A1
B2
C3
D5
正确答案
![来源:www.examk.com](data:image/png;base64,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)
答案解析
略
A1
B2
C3
D5
正确答案
答案解析
略
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背景断面须能反映水系未受污染时的背景值。要求基本上不受人类活动的影响,远离()
(单选题)
在河流、流域(水系)主要污染指标的确定时,将水质超过Ⅲ类标准的指标按其断面超标率大小排列,一般取断面超标率最大的前()项为主要污染指标。
(判断题)
在应急监测中,对江河的采样应在事故地点及其下游布点采样,同时要在事故发生地点上游才对照样
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