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Retrospective Analysis of New and Severe ADR Case Reports in Our Hospital from 2002 to 2006;

我院2002～2006年新的和严重的药品不良反应报告分析

In the paper,the propertices of the roots of adjoint polynomial for a class of graph is investigated,and prove the roots to be single multiple.

研究了一类图伴随多项式的根的性质,并给出了这类图的伴随根是单重的。