凡一人以上符合资格的竞买人对拍卖标的提出竞买申请的，拍卖人不得无故撤回该标的或终止拍卖，更不得以其他形式转让拍卖标的。（）
参考答案：错
我国古代历史出现的“百家争鸣”文化繁荣景象发生在( )。
A．春秋战国时期B．秦汉时期C．隋唐时期D．魏晋南北朝时期
An analyst does research about relationship between credit spreads and economic well being. In general, credit spreads on corporate bonds tend to:（）
A. tighten during both economic expansions and economic contractions.
B. widen during economic expansions and tighten during economic contractions.
C. tighten during economic expansions and widen during economic contractions.
