题目

On the ground _______ the man, his face as white as a sheet of paper. A. lie B. lied C. lay D. laid 答案：C解析: 略双曲线的实轴长为12，焦距为20，则该双曲线的标准方程为（　　）A．x236-y264=1B．x264-y236=1C．x236-y264=1或 x264-y236=1D．y236-x264=1