题目

下列各项中的物质,能满足如图中阴影部分关系的是(  )                                      ①②③④ ANaClK2SO4KCl(NH4)2SO4 BNaClK2SO4KClNH4Cl CNa2SO4K2SO4KClNH4Cl DNa2SO4K2SO4KCl(NH4)2SO4 答案：C下面是5个中学生遇到的难题和某报专栏编辑给他们的建议。请将问题与建议配对。 (  )71. Sometimes I get angry easily and shout at my friends. That makes them think I’m not friendly to them. (  )72. In my teachers’ eyes, I am a good student. Both my classmates and my parents also think so. No one knows what my problem is. I often feel worried about my schoolwork. (  )73. My parents never allow me to play computer games at all. They want me to study all day and do well in my exams. I feel unhappy. (  )74. I want to join in some after-school activities, but my parents think they are too dangerous and don’t allow me to go out alone. (  )75. My mother gets me to take piano lessons. She makes it a rule that I must practice two hours a day. I really try my best, but I just can’t play well. A. Let your parents know you will not be alone. Also, you can ask a teacher to talk to your parents about the after-school activities. B. Don’t worry. You can still have some indoor sports. They are also fun. C. Don’t worry, even great piano players have to practice. Hard work and a lot of practice are the only way to become a good piano player. D. When you feel angry you should stop talking and count from one to ten or walk away until you keep quiet. E. Tell your friends how you are feeling. You are in a new class, but you still need their friendship. Also, you can make new friends. F. Don’t worry. Everybody worries about their schoolwork, even those students like you who study well. Find a hobby or a sport to help you relax for a while. G. Tell your parents that many kids play computer games and do well at school, too. Ask them to let you play computer games for a short time on weekends.