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This article analyzes the economic impact of the COVID-19 outbreak,and puts forward with five basic insights concing the......
Study on Relation Between Dynamic Pattern of Regional Vertical Strain Rate and Several Strong Earthq
为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7......
