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结合《生物入侵者》的几个课例,从教学内容选择、课堂活动组织、拓展延伸开发三方面入手,谈谈说明文教学的有效策略
Combining with several examples of “biological invaders”, this article starts with three aspects: the selection of teaching contents, the organization of classroom activities and the extension of development, and discusses the effective strategies of instructional teaching