如图是鸟的�吸系统结构示意图据图回答问题1家鸽�气时气体流动方�是 .2图中�的作用是 具体体现在鸟每�吸一次在 中进行 次 Template




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tomski如图是鸟的�吸系统结构示意图据图回答问题1家鸽�气时气体流动方�是 .2图中�的作用是 具体体现在鸟每�吸一次在 coloring