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lake sediment geochemical survey
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lake sediment geochemical survey
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理学
地球化学勘查
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lake sediment geochemical survey
湖积物地球化学测量
通过系统采集湖底沉积物样品,分析其中的化学元素、化合物及其他地球化学指标的含量,发现湖底沉积物中元素和化合物的地球化学异常及其空间分布,研究异常元素和化合物的来源、成因、迁移途径及影响因素,以达到矿产勘查、污染调查、风险评价与监测预警等目的的地球化学勘查方法。
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policy and mechanism of media human resource management
policy and regulation for spatial data
policy bank statistics
policy-based insurance
policy change cycle
policy change dynamics
policy choice
policy community
policy competition
policy conflicts and elimination
policy cost
policy design
policy design research
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policy effect evaluation method
policy entrepreneur
policy evaluation
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policy evaluator
policy experiment and policy promotion
policy for the construction of important agricultural production bases
policy for transformation of resource-based cities
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policy impact evaluation
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