皮皮学，免费搜题
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【单选题】
《地表水和污水监测技术规范》 (HJ/T 91-2002) 中规定被国家或地方环境保护行政主管部门列为年度监测的重点排污单位的地方环境监测站对污染源的监督性监测每年不少于( )。
A.
1~2 次
B.
2~4 次
C.
3~5 次
D.
4~6 次
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【简答题】请把相应的英文单词和中文词汇匹配起来。
查看完整题目与答案