题目

When someone reads the right book at the right time in his life, it can have a profound effect. Such is the case for the people on this list, who come from all walks of life. These people have singled out a book that they read which had a life-changing effect on them. They, in turn, affected the worlds of science, technology and politics. 1. That Printer Of Udell’s—Ronald Reagan One book that had a big effect on former President Ronald Reagan as a child was the Christian-book That Printer of Udell’s, by Harold Bell Wright. The main character of the book, Dick Falkner, was born 已知关于x的方程（a﹣1）x2﹣2x+1=0有实数根，则a的取值范围是（　　）A. a≤2 B. a＞2 C. a≤2且a≠1 D. a＜﹣2