题目

信息归纳 下面是一篇摘自CCTV央视网的报道。请仔细阅读该报道，按信息表中项目要求在答卷上的信息表中填写信息。                                                           Liu Wei: Armless pianist     A 23-year-old pianist, Liu Wei, played the piano with his feet in Viena's Golden Saal Concert hall（维也纳金色大厅）in early 2011. He played the famous Chinese piece Butterfly Lover, a piece of music about the story of Liang Shanbo and Zhu Yingtai, not with hands, but with feet.3．两个固定的等量异种电荷，在它们连线的垂直平分线上有a、b两点，如图所示，下列说法正确的是（　　）A．a点场强比b点场强大B．a点场强比b点场强小C．a点电势比b点电势高D．a点电势比b点电势低