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当前学科:环境影响评价技术导则与标准
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根据《环境影响评价技术导则-地下水环境》,当Ⅰ类建设项目位于基岩地区时,地下水一级评价,现状调查评价范围为()。
A
同一地下水文地质单元
B
≤20
C
30
D
≥50
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