The results showed that the toxicity of mixture of lead and zinc could be explained as antagonistic action, while the toxicity of mixtures of lead andcadmium, cadmium and zinc showed to be synergistic action.

• 结果表明：铅和锌共存时的联合毒性为拮抗作用，而镉和锌，镉和铅共存时主要表现为毒性剧增的协同作用。