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【自读导言】 自读要求 1.了解有关极光的知识，培养学生关注和了解自然的兴趣。 2.了解科普说明文的写作方法。 自读重点 1.从整体把握文章内容，筛选重要信息。 2.科普故事语言表达的准确性、形象性。 自读难点 如何整体把握，筛选信息。 自读准备 学生课前通
[Reading Introduction] Self-Reading Requirements 1. Understand the knowledge about Aurora, and cultivate students’ interest in understanding and understanding nature. 2. Learn how to write science explanatory texts. Self-reading key 1. Grasp the content of the article as a whole and screen important information. 2. The accuracy and image of language expressions in science stories. Self-reading difficulties How to grasp the overall situation and filter information. Self-reading preparation