图为肺泡内的气体交换示意图ab表示血管箭头表示血液流动方�.下列叙述中正确的是 Aa为肺静脉其内流动脉血 Bb为肺动脉 Template




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tomski图为肺泡内的气体交换示意图ab表示血管箭头表示血液流动方�.下列叙述中正确的是 aa为肺静脉其内流动脉血 bb为肺动脉 coloring