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【单选题】
以下选项中不属于浦肯野纤维动作电位2期特点的是A.
复极缓慢
B.
持续100～150ms
C.
是心肌不应期较长的主要原因
D.
该期的内向离子流主要是Na + 内流，尚有少部分Ca 2+ 内流
E.
该期神经递质及药物的影响
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参考解析：
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