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【单选题】
以下关于动作电位的描述,正确的是
A.
动作电位是细胞受刺激时出现的快速而不可逆的电位变化
B.
膜电位由内正外负变为内负外正
C.
一般表现为峰电位
D.
刺激强度越大，动作电位幅度也越高
E.
受刺激后，细胞膜电位的变化也可称为复极化
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A.
Health means living in harmony with nature．
B.
Healing is a biological process．
C.
There is no difference between health and disease．
D.
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