如右图所示把锌片和铜片用导线相连后插入稀硫酸溶液构成原电池下列叙述正确的是 A.zn是负极�生还原反应 b.电流从锌片经外电路流�铜片 Template




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tomski如右图所示把锌片和铜片用导线相连后插入稀硫酸溶液构成原电池下列叙述正确的是 a.zn是负极�生还原反应 b.电流从锌片经外电路流�铜片 coloring