题目内容
浓度为1ppm的铅溶液系指
2021-10-20
A.铅含量为百分之一的溶液
B.铅含量为千分之一的溶液
C.铅含量为万分之一的溶液
D.铅含量为十万分之一的溶液
E.铅含量为百万分之一的溶液
试卷相关题目
SQL Error: select id,body,options from ***_enewstiku where sourceid='26132' and id < 2189539 and id<>'2189539' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='26132' and id > 2189539 and id<>'2189539' order by id asc limit 5