如图三种血管及血液流动的示意图据图作答1图中所示血管a为动脉血管b为毛细血管血管c为静脉.2b血管的特点是管内的红细胞单行通过 Template




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tomski如图三种血管及血液流动的示意图据图作答1图中所示血管a为动脉血管b为毛细血管血管c为静脉.2b血管的特点是管内的红细胞单行通过 coloring