题目内容
下列各类物质中,一定含有氢氧两种元素的是( )
试卷相关题目
SQL Error: select id,body,options from ***_enewstiku_ where sourceid='21380' and id < 1854540 and id<>'1854540' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='21380' and id > 1854540 and id<>'1854540' order by id asc limit 5