1位有双键，17位有羟基()
E
暂无解析
200ml溶液中加入10%氯化钾溶液不能超过（）
Becauseofthebadweather,thesportsmeethadtobe________.
_______foryourlaziness，youcouldhavefinishedtheassignmentbynow.
名词解释：急性咽一结合膜热
Thetwogirlscompetedwitheachother______thehighestmark.
