如图是人体血液循环模式图请据图回答1在ab处进行气体交换a处气体交换的实质是 B处或静脉血变成了动脉血或二氧化碳减�气体交换的 Template




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tomski如图是人体血液循环模式图请据图回答1在ab处进行气体交换a处气体交换的实质是 b处或静脉血变成了动脉血或二氧化碳减�气体交换的 coloring