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7Joseph S. Krajcik, & Charlence M, Czemiak, & Carl F. Berger 著．王磊等译．中小学科学教学-基于项目的方法与策略．北京：高等教育出版社，2004，61—63
8Joseph S．Krajcik，& Charlence M．Czemiak．& Carl F．Berger著．王磊等译．中小学科学教学-基于项目的方法与策略．北京：高等教育出版社．2004．66—68
