中文说明：产品生命周期Gompertz模型在畅销型教辅图书营销预测中的应用
English Description：
Application of Gompertz model of product life cycle in the Marketing Prediction of best selling teaching assistant books
Application of Gompertz model of product life cycle in the Marketing Prediction of best selling teac
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中文说明：产品生命周期Gompertz模型在畅销型教辅图书营销预测中的应用
English Description：
Application of Gompertz model of product life cycle in the Marketing Prediction of best selling teaching assistant books产品生命周期Gompertz模型在畅销型教辅图书营销预测中的应用 .caj