由投资者买卖已发行的债券形成的市场是（ ）。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='25443' and id < 2143213 and id<>'2143213' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25443' and id > 2143213 and id<>'2143213' order by id asc limit 5