Some students, parents and teachers in Shanghai were surveyed last month. According to the result of the survey, the generation gap(代沟) between students and parents as well as teachers is becoming wider. Here is what they said.
Voice of the students:
   “Our parents hold too high expectations which put us under lots of pressure. They care too much about our lives and studies,” one student said.
   “It's impolite that some students’ parents read their children's diaries without permission!” one student said angrily.
   “Some of our teachers are so serious that we can't make friends with them at all,” another student said sadly.
Voice of the parents:
   One mother said, “After school, my daughter usually locks herself into her room and spends lots of time talking with others on the phone. And I can't stand her clothes and hairstyle!”
   “I thought my son was doing very well in his studies. I didn't realize I was being cheated by him until I got a call from his teacher,” said a father.
Voice of the teachers:
   An English teacher said, “Today, the role of the teacher is to put knowledge into students' brains. The power of teachers has kept students away from them.”
   “Some parents pay too much attention to their children's grades instead of creating a lively and colorful environment at home,” another teacher said.
   “In the past, teachers and students often played games together or talked with each other. Today, only studies and grades are talked about,” said a teacher. “A school should be a place where students can learn not only knowledge, but also how to face failure and frustration bravely enough.

已知等差数列{a_n}满足a₁=1，且a₂、a₇﹣3、a₈成等比数列，数列{b_n}的前n项和T_n=aⁿ﹣1（其中a为正常数）．求{a_n}的前项和S_n；

    Jodie's Daddy is a Garbageman(垃圾清理工)

    Mr Swales wanted to find out what his students' parents did. He had just called Jodie when some girls burst out laughing. Shirley shouted, “Jodie's Daddy is a Garbageman!”

    Everybody in the class laughed out loud, except Jodie. She felt her face turn red.

    “Silence!” Mr Swales said, “Being a garbagemen is a difficult and useful job. We should all be thankful to Jodie's father.”

Jodie's father came to walk her home from school as usual, but she didn't run up to him the way she always did. When they got back home, Jodie went to her room and cried for a long time.

    Her father came into her room, “What happened, Jodie? Why are you so sad?”

    Jodie told her father what had happened and looked at him. He didn't seem angry or hurt. “Well,” he said, “they are right. Being a garbageman is a dirty job. Tomorrow's Saturday. Come to work with me, Jodie.”

    The place really smell too good. Jodie wrinkled her nose. “Don't worry, kid. In five minutes you won't smell a thing.” said her father.

    Everybody there was working hard, and they seemed to have a good time. Jodie's father handed her a pair of gloves and told her to get the little plastic bags and throw them into the truck.

    It was fun, but also hard work. Jodie's arms soom got tired. At last, no more garbage was left and Jodie felt very happy.

    “Garbage is disgusting, but when we clear it away, everything's nice and clean. You can make yourself happy only by making other happy. That's why I like being a garbageman so much.”

    Jodie give her dirty, smeely garbageman daddy a big kiss(吻). She said, “When I grow up, I will be a garbagegirl!”

    Now whenever someone asks Jodie what her daddy does, she says, “He's a garbageman! Everybody makes garbage, but my daddy takes it away!”