在内蒙古那达慕大会上常见的当地体育运动项目是（）
A.泼水
B.跳板
C.上刀山
D.摔跤
参考答案：D
已知f（x）=4x2+bx+3a+b是偶函数，其定义域是[a-6，2a]，则点（a，b）的坐标为______．
Recently some Japanese have been trying to make conflicts with China, ________ attempts we are concerned.
A．whose
B．with which
C．about which
D．about whose
