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为什么搜救犬靠气味找人？
简单的摘要：搜救犬靠气味找人，是因为人体气味具有独特性、搜救犬嗅觉极其灵敏，以及气味分子能在空气中传播。
1、人体气味具有独特性。每个人体都散发着独特的气味，这些气味由汗液、皮肤细胞、细菌、油脂等多种因素产生。搜救犬能够识别这些独特的气味，从而找到特定的人。
2、搜救犬嗅觉极其灵敏。搜救犬的嗅觉细胞数量远超人类，其嗅觉灵敏度可以达到人类的40倍以上。这种高度发达的嗅觉能力使它们能够捕捉到极低浓度的气味分子，从而在复杂环境中找到目标。
3、气味分子能在空气中传播。人体气味分子会随着空气流动扩散到周围环境中。搜救犬通过嗅觉追踪这些气味分子，即使在地下、废墟等隐蔽场所也能找到幸存者。
总结：搜救犬靠气味找人，是因为人体气味具有独特性、搜救犬嗅觉极其灵敏，以及气味分子能在空气中传播。
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