7.如图为肺泡内的气体交换示意图下列叙述正确的是 A.过程a与b是通过气体扩散作用实现的b.血管乙中的血液进入心脏时最先进入右心房c.与 Template




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tomski7.如图为肺泡内的气体交换示意图下列叙述正确的是 a.过程a与b是通过气体扩散作用实现的b.血管乙中的血液进入心脏时最先进入右心房c.与 coloring