A.無水乙醇B.硫酸C.硝酸D.王水
A.刻面尖點(diǎn)未對(duì)齊B.冠亭錯(cuò)位C.亭深不均D.骨狀腰
A.黑底效應(yīng)B.魚眼效應(yīng)C.單翻效應(yīng)D.領(lǐng)結(jié)效應(yīng)