A.隔離物變得暗淡無(wú)光或呈微黃色B.含有錳質(zhì)時(shí)則呈現(xiàn)紫色C.含有鐵質(zhì)時(shí),顏色變?yōu)闇\紅色D.極板顏色變深
A.監(jiān)聽(tīng)B.調(diào)試C.改造D.自環(huán)測(cè)試
A.良好的正極板形狀是一致的B.充電后呈深褐色,并有柔軟感C.當(dāng)電解液內(nèi)混入不純物質(zhì)時(shí)會(huì)使極板彎曲、伸長(zhǎng)和裂開(kāi)D.負(fù)極板應(yīng)呈純黑色