取粉末少许加硫酸一滴，酸液渐变成蓝色、紫色、红褐色或棕色，该法是检查

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='26298' and id < 2200011 and id<>'2200011' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='26298' and id > 2200011 and id<>'2200011' order by id asc limit 5