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Gaokao Biology Practice Question

3．（6分）神经细胞处于静息状态时，细胞内外K+和Na+的分布特征是（）

  1. A.细胞外K+和Na+浓度均高于细胞内
  2. B.细胞外K+和Na+浓度均低于细胞内
  3. C.细胞外K+浓度高于细胞内，Na+相反
  4. D.细胞外K+浓度低于细胞内，Na+相反

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