下图是血液循环示意图请据图回答问题 1人体输送血液的泵是 2体循环的起点是图中的 3在血液循环中静脉血经过 循环 Template




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tomski下图是血液循环示意图请据图回答问题 1人体输送血液的泵是 2体循环的起点是图中的 coloring