已知x＜1，则$\sqrt{x^2-2x+1}$的化简的结果是  (  ) 

情感与情绪紧密相关，但有区别。下列对情感的认识不正确的是(       )  

    Kate's father took her to the hospital to see her one-day-old baby brother. They drove there straight from school. Kate had never been inside a hospital before.  ①This was a new experience for her.

    At the gate there was a large sign listing all the departments of the hospital, with arrows (箭头) showing how to find them. When Kate saw the A&E department(急救室), she asked,“What do those letters stand for?”“Accident and emergency,” replied her father,

②“Last spring, I took our sister there because she fell off her bike,”