题目

An eight-year-old child heard her parents talking about her little brother. All she knew was that he was very sick and they had no money. Only a very expensive operation could save him now and there was no one to lend them the money. When she heard her daddy say to her tearful mother, “Only a miracle (奇迹) can save him now.” The little girl went to her bedroom and pulled her money from its hiding place and counted it carefully. She hurried to a drugstore (药店) with the money in her hand. “And what do you want?” asked the salesman. “It’s for my little brother.” the gir关于x的分式方程有增根，则增根为【   】A．x=1B．x=－1C．x=3D．x=－3