题目

阅读理解Making peace at lunchtime     It was my first day at school. I felt nervous and went to all my classes with no friends. I listened carefully to all the lessons and waited for lunch. Then, finally, the bell rang. It was time to talk and have fun.     In the lunch line I met a new friend who wore a hijab (穆斯林女性) on her head, and though I am Jewish (犹太人), we got along fine. I was so happy when she said: Sit with us at our table. She pointed to the table next to the door.     So I agreed. I took my tray (餐盘) and was about to walk with her across the floo关于的方程有两个不相等的实数根，求的取值范围．