下图是人体细胞与外界环境进行物质交换的过程图解请据图回答1a表示 系统b表示 系统c表示 系统2 内环境包括 ——青夏教育 Template




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tomski下图是人体细胞与外界环境进行物质交换的过程图解请据图回答1a表示 系统b表示 系统c表示 coloring