题目下图是有关脊椎动物类群的代表动物请据图回答有关问题�a类动物�吸时气体交换的部位是 中的毛细血管b类动物用肺�吸 辅助�吸� Template




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tomski题目下图是有关脊椎动物类群的代表动物请据图回答有关问题�a类动物�吸时气体交换的部位是 中的毛细血管b类动物用肺�吸 辅助�吸� coloring