题目

 Tom asked my friend ________.         A. where was he from            B. that the earth is bigger than the moon         C. when did he came back         D. not to be so angry 答案：D已知两圆的圆心距是5，两个圆的半径分别是方程x2-3x+2=0的两个根，则这两个圆的位置关系是（　　） A、内含B、相交C、内切D、外离