一、几种图书生命周期曲线在图书生命周期的四个阶段中(见图1),引入期和成长期持续较长时间的经典生命周期曲线类型,往往出现在某些图书产品大类或专业板块;但当这种类型的生命周期曲线出现在某一种书上,将是对出版者的考验:出版者要确信这本书针对的读者消费有明确的时间分布 First, several book life cycle curve in the book life cycle of the four stages (see Figure 1), the introduction of the period and the growth of the long life of the classic life cycle curve types often appear in some book product categories or professional But when this type of life-cycle curve appears on a book, it will be a test for the publisher: the publisher is convinced that there is a definite time distribution of readership spending for this book