如图是细胞与内环境进行物质交换的示意图�处的箭头表示血液流动的方�下列说法正确的是 A.�是人体内新陈代谢的主要场所b.毛细血管管壁 Template




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tomski如图是细胞与内环境进行物质交换的示意图�处的箭头表示血液流动的方�下列说法正确的是 a.�是人体内新陈代谢的主要场所b.毛细血管管壁 coloring