The contaminations are often in the form of a various mixture in pollutioned water.But there was little toxicological data about heavy metals combined with other pollutants which were effect on the lower aquatic organisms.In this assay,the toxic effect of Copper combined with dimethylacetamide(DMA) on planarian,Dugesia japonica was studied.The results showed that: Copper obviously affected the mortality of planarian,and the median lethal concentration(LC50) for 24,36,48,60,72,84,96 h were 3.608,3.272,2.959,...