题目

．_____ in the newspaper that there is another good harvest this year.   A. It has reported              B. As is reported    C. That is reported  D. It is reported 答案：D以抛物线y2+8x=0的顶点为中心、焦点为一个顶点且离心率e=2的双曲线的标准方程是（　　）A．x24-y212=1B．x216-y248=1C．y24-x212=1D．x216-y248=1