多项选择题 Physical similarity simulation versus numerical simulation what needs to be done in the material gathering step ( ).A.Calculate the location of key layers, determine the number of layers and horizons for simulationB.Analysis of geological conditions, obtain the comprehensive histogram of coal and rock strataC.Obtain the physical and mechanical properties of rock are through experimentsD.Get a geological overview, identify the goals and problems of the simulation
单项选择题
单项选择题 狭义的“低碳经济”是以减少碳排放为主要目标,构建以低碳技术、低碳产品为竞争手段的新型低碳市场及其贸易规则与财税体系( ) A. 对 B. 错