题目

— Could you tell me _______? — Yes, he _______to the Disneyland. A. where was Daming; have been          B. where Daming was; have gone C. where is Daming; has been             D. where Daming is; has gone 答案：D方程x（x-1）=2的两根为（　　） A、x1=0，x2=1B、x1=0，x2=-1C、x1=1，x2=2D、x1=-1，x2=2