关于瓦斯保护，说法正确的是（ ）

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69493' and id < 4501557 and id<>'4501557' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69493' and id > 4501557 and id<>'4501557' order by id asc limit 5