题目

如图，为椭圆的长轴的左、右端点，为坐标原点，，，为椭圆上不同于的三点，直线围成一个平行四边形，则=（ ） A．25   B．9+     C．16      D． 答案：A 听过Eddie和Hobo的对话，你能完成下面的对话吗？ Hobo：Eddie, who do you think is 1 ________________ that has ever lived? Eddie：Who?Err, let me see．Oh, it must be 2 ________________． Hobo：Who's Paul Yum?I have never 3 ________________ him．Is he a pop star? Eddie：No!He's the person who 4 ________________．