The most valuable gift I have ever received was a photo album from my best friend Kevin.

      Kevin and I were classmates for all six years of primary school. We both had the same interests, so we always had a lot of things to talk about. It is wonderful to have such a good friend.

      However, last summer, Kevin had to move to another city because of his father's job. Then he gave me a photo album. “It has photos of the memorable events we have experienced together. I've also written some notes under each photo,” he said. I was deeply moved.

      I put the album beside my bed. I always look at it when I think of Kevin.

在如图所示的多面体ABCDE中，AB⊥平面ACD，DE⊥平面ACD，AB=CD=1，AC=$\sqrt{3}$，AD=DE=2．

（Ⅰ）在线段CE上取一点F，作BF∥平面ACD（只需指出F的位置，不需证明）；

（Ⅱ）对（Ⅰ）中的点F，求直线BF与平面ADEB所成角的正弦值．

下列句中有两个错别字，请改正后用正楷字把这句话抄写在方格内。
          失志不喻地追求；不屈不饶地奋斗。