右图为人体局部血液循环示意图其中��是动脉血管�是毛细血管���内流动的均为动脉血则�的主要功能是 A.滤过作用b.气体交换 Template




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tomski右图为人体局部血液循环示意图其中��是动脉血管�是毛细血管���内流动的均为动脉血则�的主要功能是 a.滤过作用b.气体交换 coloring