题目

听材料，回答问题。 （1） At least how many times has the man been to the city? A . Once. B . Twice. C . Three times. （2） What can we learn from the conversation? A . The woman thinks it worthwhile to tear down the old buildings. B . The city looks quite different from other cities in the world. C . Many tall buildings have taken the place of the old buildings in the city. （3） What is the woman probably doing? A . Telling Tom their plan of building the city. B . Showing Tom around the city. C . Asking Tom how to solve the problem of large po若抛物线y2＝2px(p>0)上一点到准线和抛物线的对称轴的距离分别为10和6，则该点横坐标为A.10或1B.9或1C.10或2D.9或2