请问以下能源哪个属于“二次能源”？（ )

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='27099' and id < 2247069 and id<>'2247069' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='27099' and id > 2247069 and id<>'2247069' order by id asc limit 5