定义在1，+∞）上的函数f（x）满足：（1）f（2x）=2f（x）；（2）当2≤x≤4时，f（x）=1﹣|x﹣3|，则集合S={x|f（x）=f（34）}中的最小元素是____ 

   When Susan told me that she was terribly ill and probably would die. I cried. I didn't understand why this happened to my best friend. Then Susan1me a red ribbon(丝带) without saying anything.
   A month later, Susan was at a hospital about two hours away from where we lived. I asked my dad to take me to see her. I wanted to give my best friend a 2. So I took out the ribbon and cut it into two pieces with scissors(剪刀). I put one in my pocket and the other in an envelope(信封), along with a letter explaining it to her. I told her to keep her 3 beside her bed, and I would keep mine near me, too. Then I went to the hospital one Friday afternoon, wondering (想知道) if the ribbon would 4anything to her. I walked into the room and ran over to give her a big hug. Then I gave her a teddy bear and the envelope. We talked for a while and then she started looking5, so I asked her to get some rest and left the hospital. All the way home I 6the ribbon close to me.
   For the next four months, the ribbon was with me7 I went: school, home, shopping, and at friends’ houses. Where I went, it went. It was something to remind(提醒)me that I had a friend who would 8 home very soon. Susan said that she wore her ribbon 9 her arm all the time and she always had it close to her when she was being tested and treated.
   Finally, Susan came home! I was so happy. That night, I looked at the ribbon which was still with me. I had a feeling it would never 10, that I would remember what had happened during the time she had been ill.

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