题目小张和父亲预定搭乘家门口的公共汽车赶往火车站,去家乡看望爷爷,在行驶了一半路程时,小张向司机询问到火车站的时间,司机估计继续乘公共汽车到火车站时,火车将正好开出,根据司机的建议,小张和父亲随即下车改乘出租车,车速提高了一倍,结果赶在火车开前 The subject Xiao Zhang and his father were scheduled to take the bus at their doorstep and rushed to the train station to visit his grandfather in his hometown. When he was halfway through the journey, Xiao Zhang asked the driver about the time to the train station. The driver estimated that he would continue to take the bus to the train station. The train will start right away. According to the driver’s suggestion, Xiao Zhang and his father will immediately get out of the taxi and change to a taxi. The speed will double, and the result will be before the train starts.