A Research of Surplus Management Among Listed Companies through Nonrecurring Gains and Losses--An Empirical Analysis on the Item of Nonrecurring Gains and Losses Disclosed by Listed Companies是什么意思 A Research of Surplus Management Among Listed Companies through Nonrecurring Gains and Losses--An Empirical Analysis on the Item of Nonrecurring Gains and Losses Disclosed by Listed Companies怎么读