题目

在0.1mol•L﹣1 CH3COOH溶液中存在如下电离平衡：CH3COOH⇌CH3COO﹣+H+，对于该平衡，下列叙述正确的是（ ） A．加入水时，平衡向逆反应方向移动 B．加入少量NaOH固体，平衡向正反应方向移动 C．加入少量0.1mol•L﹣1 HCl溶液，溶液中c（H+）减小 D．加入少量CH3COONa固体，平衡向正反应方向移动 答案：【考点】D5：弱电解质在水溶液中的电离平衡． 【分析】A、稀释弱电解质溶液，会促进电离； B、H+被氢氧化钠消耗，平衡向着正向移动； C、引进了氢离子，平衡向着逆向移动，但是c（H+）会增大； D、加入醋酸根离子，平衡向着逆向移动． 【解答】解：A、加入水时，溶液被稀释，电离平衡向着正向Many of us learn valuable lessons from our patients. I was  36  to learn one early in my career as a nurse. I have  37  her name, but she has influenced the way I treat many other patients. I was working the 3-11 pm shift at a small hospital at that time. The patient was a 42-year-old woman who had  38  a heart attack. She was expected to stay in  39  for about two weeks before being sent home. She was  40  that she could not see her three young children. We did not  41  children into a hospital in those days. Every evening, we would  42  our children. I had one daughter and I loved her so much that I could not  43  not seeing her every day. The patient was getting  44  and we both knew it wouldn’t be long before she would be home  45  her little ones again. About a week later, she  46  me to sit with her for a while. I held her hand and she told me she was  47  and thought she might not see her kids again. I tried to let her know that her  48  so far had been great. It was 10:30 pm, almost time for the  49  of my work. I told her I had to hand in my 50  and that I would come back to her room. Then I  51  with my friends. It wasn’t until I had got home that I realized I had forgotten to keep my promise. “That’s OK,” I thought, “I will spend  52  time with her tomorrow.” The next day I was told that she had  53  at midnight. She wanted company and I let her down. She left the world quietly. If I had stayed in her room, would she be home surrounded by her  54  right now? I would never know. What I do know is this: I have  55  every patient’s request since that night. 小题1:A．fortunateB．afraid C．smart D．brave小题2:A．replacedB．spread C．asked D．forgotten小题3:A．treated B．suffered C．checked D．damaged小题4:A．townB．school C．room D．hospital小题5:A．delightedB．calmC．upset D．hopeful小题6:A．needB．allowC．pull D．force小题7:A．talk aboutB．look afterC．play with D．deal with小题8:A．imagine B．avoidC．enjoy D．practice小题9:A．fatterB．betterC．warmer D．older小题10:A．betweenB．against C．with D．on小题11:A．askedB．paid C．permitted D．ordered小题12:A．relaxedB．scared C．confident D．honest小题13:A．attitudeB．methodC．progress D．idea小题14:A．developmentB．period C．change D．end小题15:A．homeworkB．report C．design D．drawing小题16:A．argued B．arrived C．boarded D．left小题17:A．extraB．useful C．valuable D．little小题18:A．diedB．disappearedC．escaped D．agreed小题19:A．kidsB．patientsC．nurses D．doctors小题20:A．learned fromB．looked for C．cared aboutD．made up