下列说法正确的是（ ）
A．原电池是把电能转化为化学能的装置
B．原电池中电子流出的一极是正极
C．原电池的两极发生的反应均为氧化还原反应
D．形成原电池后，原电池中的阳离子移向正极
答案：D
题目分析：原电池是把化学能转化为电能的装置，A不正确；原电池中电子流出的一极是负极，B不正确；原电池的负极发生氧化还原反应，正极发生还原反应，C不正确；形成原电池后，原电池中的阳离子移向正极，D正确，答案选D。
点评：该题是高考中的常见考点，属于基础性试题的考查，难度不大。该题的关键是明确原电池的工作原理，然后灵活运用即可。
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