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17．人之所以能在有大量病原体存在的环境中健康生活是因为人体具有保卫自身的三道防线．如图是关于人体第一道和第二道防线的卡通图解根据图示回答 Template






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tomski17．人之所以能在有大量病原体存在的环境中健康生活是因为人体具有保卫自身的三道防线．如图是关于人体第一道和第二道防线的卡通图解根据图示回答 coloring
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17．人之所以能在有大量病原体存在的环境中健康生活是因为人体具有保卫自身的三道防线．如图是关于人体第一道和第二道防线的卡通图解根据图示回答 sketch template
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第一道防线和第二道防线是人生来就有的因为对多种病原体多种病原体都有防御作用所以叫做非特异性免疫非特异性免疫又称为先天性免疫先天性免疫 sketch template
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