在烧杯中加入盐水,将铜片和锌片插入盐水中,就制成了一个电池。用电压表测量这个自制电池的电压,其现象如图所示。下列说法中错误的是( Template


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tomski在烧杯中加入盐水,将铜片和锌片插入盐水中,就制成了一个电池。用电压表测量这个自制电池的电压,其现象如图所示。下列说法中错误的是( coloring