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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......
十一年来我每月对英格兰南部海岸沙滩底动物群落的变化进行定期监测.群落动物区系的样本采集采用0.5 mm的滤网,同时测定盐度、水温......
The growth rate of the hyalid amphipod Hyale perieri was studied on the bases of Ikeda's growth model which is based......
