题目内容
间接碘量法加入淀粉指示剂的适宜时间是
2021-10-18
A.滴定开始时
B.滴定至50%左右时
C.滴定至I3-的红棕色褪尽,溶液无颜色时
D.接近终点时
E.什么时候加入均可
试卷相关题目
SQL Error: select id,body,options from ***_enewstiku where sourceid='26011' and id < 2182880 and id<>'2182880' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='26011' and id > 2182880 and id<>'2182880' order by id asc limit 5