【单选题】【消耗次数：1】
下列原因哪一个可造成蓄电池硫化?( )。
①
大电流过充电
②
电解液液面过高
③
长期充电不足
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完全充电的汽车蓄电池,电解液(校正到80F)的相对密度为(([填空]))。
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