右图是土豆电池的示意图。土豆电池工作时, 下列有关说法正确的

右图是土豆电池的示意图。土豆电池工作时,

下列有关说法正确的是

AFe用作正极

   BCu片质量减少

   C.电子由Fe并经导线流向Cu

   D.实现了电能向化学能的转化

答案

C

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