— It’s late now. We must go back to the ________. — Yes. I really need a good sleep. A. hospital B. supermarket C. theatre D. hotel 答案:D10.下列叙述不正确的是( )A.纯水也是一种电解质B.无论是酸性、中性还是碱性稀溶液,只要温度恒定,c(H+)×c(OH-)是一个常数C.一定温度下,0.1mol•L-1的磷酸溶液中H+主要来自于酸的第一步电离D.强碱溶液中不存在H+