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特化细胞的结构与功能
特化细胞的考点是结构与功能的对应关系：某个结构特征如何服务于该细胞的具体功能。只描述形态不给分。
写「结构 → 因此 → 功能」。缺少中间那一步的答案，在英澳的评分标准里只算描述。
看题目要求。要画就必须标注，未标注的图通常不得分。
看分值。两分题写两个「结构—功能」对应，四分题写四个。
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