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【单选题】
高等动物和人的内环境能够保持相对稳定。下列各项生理活动中，与内环境的稳态没有直接关系的选项是 [ ]A.
通过汗和尿排泄废物
B.
将食物残渣形成粪便排出体外
C.
血液运输氧和废物
D.
血液中二氧化碳增加会使呼吸加快
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