如图是一个人体气体交换示意图据图回答甲乙两处的气体交换主要通过的原理是 A.�吸作用b.渗透作用c.扩散作用d.交换作用——青夏教育 Template




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tomski如图是一个人体气体交换示意图据图回答甲乙两处的气体交换主要通过的原理是 a.�吸作用b.渗透作用c.扩散作用d.交换作用——青夏教育 coloring