题目

 Though ________ to see us, the organizer gave us a warm welcome.    A. surprising              B. surprised          C. being surprised     D. was surprised 答案：B下列说法中错误的是 [　　] A．半径相等的两个圆是等圆 B．长度相等的两条弧是等弧 C．能够互相重合的两条弧是等弧 D．圆是平面上到定点的距离等于定长的所有点组成的图形