题目

某溶液中存在大量的Na+、OHˉ、Clˉ、，该溶液中还可能大量存在的是( )A. B.Ca2+ C. D. 答案：【答案】D【解析】与OH-不能大量共存，Ca2+和OH-、均不能大量共存，和OH-不能大量共存，则只有与Na+、OHˉ、Clˉ、能大量共存，故答案为D。This is the hotel __________last month.? A.which they stayed                           B.at that they stayed? C.where they stayed at                        D.where they stayed?