如图是人体三种血管的示意图请结合有关知识回答1b是 与其功能相适应的特点有管壁厚管腔小.2b血管内含氧量多与其相连的心腔是 Template




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tomski如图是人体三种血管的示意图请结合有关知识回答1b是 与其功能相适应的特点有管壁厚管腔小.2b血管内含氧量多与其相连的心腔是 coloring