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【单选题】
神经细胞在接受一次阈上刺激后,其兴奋性的周期变化是A.
相对不应期→绝对不应期→超→低
B.
绝对不应期→相对不应期→低→超
C.
绝对不应期→低→相对不应期→超
D.
绝对不应期→相对不应期→超→低
E.
绝对不应期→超→低→相对不应期
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