1%—3%过氧化氢溶液用于口腔护理的作用是（ ）。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='31065' and id < 2498675 and id<>'2498675' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='31065' and id > 2498675 and id<>'2498675' order by id asc limit 5