关于磁场和磁感线的描述，下列说法中不正确的是：(    )

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku_ where sourceid='8711' and id < 706118 and id<>'706118' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='8711' and id > 706118 and id<>'706118' order by id asc limit 5