题目内容
普通玻璃的主要成分是()。
2021-11-17
A.Na20
B.CaO
C.H2Si03
D.Si02
试卷相关题目
SQL Error: select id,body,options from ***_enewstiku where sourceid='28152' and id < 2308225 and id<>'2308225' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='28152' and id > 2308225 and id<>'2308225' order by id asc limit 5