拍卖人及其工作人员可否参与竞买？

A. 正确
B. 错误

A. the primary great circle of the Earth perpendicular to the axis
B. the line to which all celestial observations are reduced
C. the line from which a celestial body's altitude is measured
D. All of the above

A. 马斯洛
B. 布拉姆
C. 麦特曼
D. 卡渡维奇