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11、电流表(dian liu biao)的使用规则：①电流表(dian liu biao)要串联在电路中；②电流要从"+"接线柱流入,从"-"接线柱流出；③被测电流不要超过电流表(dian liu biao)的量程；④绝对不允许不经过用电器而把电流表(dian liu biao)连到电源的两极上...