引发体由下列哪些物质构成（    ）

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='27517' and id < 2271332 and id<>'2271332' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='27517' and id > 2271332 and id<>'2271332' order by id asc limit 5