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【多选题】
关于动作电位描述正确的是
A.
有效刺激引起细胞膜去极化,达到阈电位水平时产生动作电位
B.
锋电位是动作电位的标志
C.
动作电位是细胞兴奋的标志
D.
不同的可兴奋细胞其动作电位的幅度和持续时间都相同
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