题目

—Watch out! Your hair ______ caught in the machine! — Thank you! I ______ realize I was so close to it. A . must be; didn't B . may get; don't C . needs to be; will D . might get; didn't 答案：D 下列溶液中，有关离子一定能大量共存的是 [　　] A． 能使石蕊呈蓝色的溶液中：Na+、I－、AlO2－、NO3－ B． 能使甲基橙呈黄色的溶液中：K+，SO，SO，CO－ C． 能使pH试纸变红色的溶液中：Mg2+，Fe3+，NO，[Ag(NH3)2]+ D． 能跟金属铝反应生成氢气的溶液中：NH，Al2+，Cl－，SO