题目

He is quiet and shy. He likes to hide(隐藏) his eyes behind his hair. He doesn’t smile very often. However, if you talk to him about music, he’ll have a lot to say. This is Jay Chou, the 24-year-old Taiwanese pop king(天王). His fans are so excited because he will sing songs in Beijing on September 12. Those songs are from his new album (唱片), “Ye Huimei”, and the album was released (发行) in July and was named after his mother. Chou grew up just with his mother. He did not talk much and did badly in many school subjects. His mother noticed the boy’s special interes两圆的圆心距d=4，两圆的半径分别是方程x2-5x+6=0的两个根，则两圆的位置关系是________．