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教材分析:本节教材初步简述了地球所处的宇宙环境。它是第一章教材的“骨架”和基础,其余各节是在此基础上,重点地展开讲叙的。本节教材的脉络,可以概括为:“两条线索、六类天体、四种关系,一个中心”。两条线索是指教材按纵横两线组织:纵线是
Analysis of Teaching Materials: This section of the textbook briefly describes the environment in which the earth lives. It is the “skeleton” and foundation of the first chapter of the teaching material. The rest of the sections are based on this and focus on the introduction of the narrative. The context of this section of the teaching material can be summarized as: “Two clues, six types of celestial bodies, four kinds of relationships, one center”. Two clues refer to textbooks organized by two lines: vertical lines