如图是人体血液循环和气体交换示意图.根据图回答下列问题1b中肺泡�围有丰富的 有利于进行气体交换.血液由a经过b后 明显增加.2 Template




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tomski如图是人体血液循环和气体交换示意图.根据图回答下列问题1b中肺泡�围有丰富的 有利于进行气体交换.血液由a经过b后 明显增加.2 coloring