In order to meet the demand of chip polishing,the synthesis conditions of crystalline cerium carbonate(CCC)with high pur......

目的 观察碳酸氢铵集中点投放与喷洒加黑色塑料地膜覆盖的灭螺效果.方法 选择1条环境相对独立有螺沟渠作为实验环境,分成11段,由上......