题目

阅读理解 When it comes to mental illness, many people often find it tough to get the help they need. This is especially true for young students making the transition(过渡) to college life. “Sometimes, students don't realize how hard it is to adjust to college,” said Laura Smith, associate dean of students at the University of Texas at Dallas. “You're not the big fish in your classes anymore; you have all kinds of personal stress; you're away from home. Dealing with these things is not easy.” Students who are going through these problems sometimes want to reach out. But if student若溶液中由水电离产生的c（OH-）=1×10-14mol?L-1，满足此条件的溶液中一定可以大量共存的离子组是（　　）A．Al3+、Na+、NO3-、Cl-B．K+、Na+、Cl-、NO3-C．K+、Na+、Cl-、AlO2-D．K+、NH4+、SO42-、NO3-