题目

Each of us fails from time to time. If we are wise, we accept these failures as a  21  part of the learning process. But all too often  22  parents and teachers we disallow this same right to our children.When I see a child  23   from this kind of pressure, I think of Donnie.Donnie was my youngest third-grader. His  24   of failure kept him from classroom games that other children enjoyed. He  25   answered questions--- he was afraid he might be wrong. I tried my best to build his  26   . But nothing changed until midterm, when Mary Anne, a student teacher, was assigned to our已知函数（ω＞0）的最小正周期为π．（Ⅰ）求ω的值；（Ⅱ）求函数f（x）在区间上的取值范围．